Within- and Between-Session Reliability of the Isometric Midthigh Pull in Young Female Athletes
Moeskops, S, Oliver, JL, Read, PJ, Cronin, JB, Myer, GD, Haff, GG, and Lloyd, RS. Within- and between-session reliability of the isometric midthigh pull in young female athletes. J Strength Cond Res 32(7): 1892–1901, 2018—To investigate the within- and between-session reliability of the isometric midthigh pull (IMTP) in pre– and post–peak height velocity (PHV) female athletes. Nineteen pre- and 19 post-PHV athletes performed bilateral IMTPs using a custom-designed isometric testing system. Participants attended 3 separate testing sessions and performed 3 trials within each session. Peak force, relat...
Source: Journal of Strength and Conditioning Research - June 26, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Effects of Small-Sided Games and High-Intensity Interval Training on Aerobic and Repeated Sprint Performance and Peripheral Muscle Oxygenation Changes in Elite Junior Basketball Players
Delextrat, A, Gruet, M, and Bieuzen, F. Effects of small-sided games and high-intensity interval training on aerobic and repeated sprint performance and peripheral muscle oxygenation changes in elite junior basketball players. J Strength Cond Res 32(7): 1882–1891, 2018—The aim of the current study was to compare the effects of 6 weeks of small-sided game (SSG) and high-intensity interval training (HIIT) on aerobic fitness and muscle oxygenation during a repeated sprint (RS) sequence in elite male junior basketball players. Twenty participants (14.3 ± 0.5 years; 176.8 ± 12.5 cm; 74.5 ± 9.8 k...
Source: Journal of Strength and Conditioning Research - June 26, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Accuracy of Resting Metabolic Rate Prediction Equations in Athletes
Jagim, AR, Camic, CL, Kisiolek, J, Luedke, J, Erickson, J, Jones, MT, and Oliver, JM. Accuracy of resting metabolic rate prediction equations in athletes. J Strength Cond Res 32(7): 1875–1881, 2018—The purpose of this study was to determine the accuracy of 5 different resting metabolic rate (RMR) prediction equations in male and female athletes. Twenty-two female (19.7 ± 1.4 years; 166.2 ± 5.5 cm; 63.5 ± 7.3 kg; 49.2 ± 4.3 kg of fat-free mass (FFM); 23.4 ± 4.4 body fat (BF) percent) and 28 male (20.2 ± 1.6 years; 181.9 ± 6.1 cm; 94.5 ± 16.2 kg; 79.1 &plusm...
Source: Journal of Strength and Conditioning Research - June 26, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Effects of Blood-Flow Restriction Combined With Postactivation Potentiation Stimuli on Jump Performance in Recreationally Active Men
Miller, RM, Keeter, VM, Freitas, EDS, Heishman, AD, Knehans, AW, Bemben, DA, and Bemben, MG. Effects of blood-flow restriction combined with postactivation potentiation stimuli on jump performance in recreationally active men. J Strength Cond Res 32(7): 1869–1874, 2018—Whole-body vibration (WBV) and maximum voluntary contractions (MVCs) combined with blood-flow restriction (BFR) to augment postactivation potentiation have yet to be examined. Therefore, the purpose of this investigation was to examine the augmented effects of postactivation potentiation when WBV and MVC are combined with BFR. Twenty men (21.8 &p...
Source: Journal of Strength and Conditioning Research - June 26, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Efficacy of an 8-Week Concurrent Strength and Endurance Training program on Hand Cycling Performance
Nevin, JP, Smith, P, Waldron, M, Patterson, S, Price, M, Hunt, A, and Blagrove, R. Efficacy of an 8-week concurrent strength and endurance training program on hand cycling performance. J Strength Cond Res 32(7): 1861–1868, 2018—The aim of this study was to investigate the effects of an 8-week concurrent strength and endurance training program in comparison with endurance training only on several key determinants of hand cycling performance. Five H4 and 5 H3 classified hand cyclists with at least 1 year's hand cycling training history consented to participate in the study. Subjects underwent a battery of tests t...
Source: Journal of Strength and Conditioning Research - June 26, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Low-Volume High-Intensity Interval Versus Continuous Endurance Training: Effects on Hematological and Cardiorespiratory System Adaptations in Professional Canoe Polo Athletes
This study demonstrated that paddling-based HIIT enhances aerobic capacity and respiratory makers, without negatively affecting the immune system over 3 weeks. (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - June 26, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Analysis of USA Powerlifting Federation Data From January 1, 2012–June 11, 2016
Ball, R and Weidman, D. Analysis of USA Powerlifting federation data from January 1, 2012–June 11, 2016. J Strength Cond Res 32(7): 1843–1851, 2018—In this article, we report 47,913 officially judged contestant results from powerlifting matches from January 1, 2012 to June 11, 2016 for the USA Powerlifting Federation. We found age and sex to be the most complex factors in predicting powerlifting results. For women, in general, the younger the woman is the more they can squat; the older the woman is the less they can squat. For men and women, with the 1 exception for women's squat, the peak age of lifting ...
Source: Journal of Strength and Conditioning Research - June 26, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Variability and Reliability of Punching Impact Kinetics in Untrained Participants and Experienced Boxers
Lenetsky, S, Brughelli, M, Nates, RJ, Cross, MR, and Lormier, AV. Variability and reliability of punching impact kinetics in untrained participants and experienced boxers. J Strength Cond Res 32(7): 1838–1842, 2017—Striking impact kinetics are central to performance in combat sports. Despite a multitude of assessment, few in the literature have explored the variability and reliability of punching force assessment. Consequently, this study assessed the variability and reliability of measured punching impact kinetics in untrained and experienced boxers using a recently developed and validated method of striking d...
Source: Journal of Strength and Conditioning Research - June 26, 2018 Category: Sports Medicine Tags: Technical Report Source Type: research

Relationship Between Maximum Pull-up Repetitions and First Repetition Mean Concentric Velocity
Beckham, GK, Olmeda, JJ, Flores, AJ, Echeverry, JA, Campos, AF, and Kim, SB. Relationship between maximum pull-up repetitions and first repetition mean concentric velocity. J Strength Cond Res 32(7): 1831–1837, 2018—Mean concentric velocity (MCV) of exercise execution has been used by strength and conditioning professionals to improve exercise technique, provide accurate feedback, and predict exercise 1 repetition maximum. There is still limited research on velocity-based training and currently only one research study on the pull-up exercise. The primary purpose of this research was to determine whether the max...
Source: Journal of Strength and Conditioning Research - June 26, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Effects of Foam Rolling on Range of Motion, Peak Torque, Muscle Activation, and the Hamstrings-to-Quadriceps Strength Ratios
Madoni, SN, Costa, PB, Coburn, JW, and Galpin, AJ. Effects of foam rolling on range of motion, peak torque, muscle activation, and the hamstrings-to-quadriceps strength ratios. J Strength Cond Res 32(7): 1821–1830, 2018—To examine the effects of foam rolling (FR) on range of motion (ROM), peak torque (PT), hamstrings-to-quadriceps (H:Q) ratios, and muscle activation. Twenty-two recreationally active women (mean age ± SD = 21.55 ± 1.82 years, 161.91 ± 6.58 cm, 61.47 ± 10.54 kg) volunteered for this study. Participants performed pre- and posttests analyzing PT and surface electromyogra...
Source: Journal of Strength and Conditioning Research - June 26, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Traditional Versus Suspended Push-up Muscle Activation in Athletes and Sedentary Women
Syed-Abdul, MM, Soni, DS, Miller, WM, Johnson, RJ, Barnes, JT, Pujol, TJ, and Wagganer, JD. Traditional versus suspended push-up muscle activation in athletes and sedentary women. J Strength Cond Res 32(7): 1816–1820, 2018—Many strength training programs incorporate push-up exercises, which primarily activate upper-body muscles. Past data support the fact that shoulder girdle muscles (i.e., triceps (T) and anterior deltoids [AD]) exhibit greater electromyography (EMG) activity when a push-up is performed on an unstable (i.e., suspended [SP]) vs. stable (i.e., traditional [TD]) surface (2). Sixty-nine healthy fe...
Source: Journal of Strength and Conditioning Research - June 26, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Effects of Heavy Squat Training on a Vibration Platform on Maximal Strength and Jump Performance in Resistance-Trained Men
Hammer, RL, Linton, JT, and Hammer, AM. Effects of heavy squat training on a vibration platform on maximal strength and jump performance in resistance-trained men. J Strength Cond Res 32(7): 1809–1815, 2018—The purpose of this investigation was to determine maximal strength and jump performance outcomes of heavy squat training on a low-amplitude ( (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - June 26, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Acute Neuromuscular Adaptations in Response to Low-Intensity Blood-Flow Restricted Exercise and High-Intensity Resistance Exercise: Are There Any Differences? Erratum
No abstract available (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Erratum Source Type: research

The Effect of Nitrate Supplementation on Exercise Tolerance and Performance: A Systematic Review and Meta-Analysis
Van De Walle, GP and Vukovich, MD. The effect of nitrate supplementation on exercise tolerance and performance: a systematic review and meta-analysis. J Strength Cond Res 32(6): 1796–1808, 2018—The purpose of this article was to systematically review the current literature and evaluate the overall efficacy of nitrate supplementation on exercise tolerance and performance by meta-analysis. Studies were eligible for inclusion if they met the following criteria: (a) were an experimental trial published in an English peer-reviewed journal; (b) compared the effects of inorganic nitrate consumption with a non-bioactiv...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Comparison of Serum Cytokine Levels in Men Who are Obese or Men Who are Lean: Effects of Nonlinear Periodized Resistance Training and Obesity
This study examined the capacity of nonlinear resistance training (NRT) to alter some cytokines and markers of insulin resistance in men who are obese. An additional aim was to compare these variables between men who are obese and men who are lean. Age- and fitness-matched men who are obese were randomly allocated to NRT (n = 12) and control (CON, n = 10) groups. An age- and fitness-matched control group of lean men (n = 11) were also recruited for baseline comparison. The NRT (12 weeks, 3 d·wk−1, 5–11 exercises) performed at different intensities (40–95% of 1 repetition maximum) with flexible peri...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Determinant Factors of Physical Performance and Specific Throwing in Handball Players of Different Ages
This study aimed to analyze various fitness qualities in handball players of different ages and to determine the relationships between these parameters and throwing velocity. A total of 44 handball players participated, pooled by age groups: professional (ELITE, n = 13); under-18 (U18, n = 16); under-16 (U16, n = 15). The following tests were completed: 20-m running sprints; countermovement jumps (CMJs); jump squat to determine the load that elicited ∼20 cm jump height (JSLOAD-20 cm); a progressive loading test in full squat and bench press to determine the load that elicited ∼1 m·s−1 (SQ-V1-LOAD and B...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Influences of Playing Position and Quality of Opposition on Standardized Relative Distance Covered in Domestic Women's Field Hockey: Implications for Coaches
Vinson, D, Gerrett, N, and James, DVB. Influences of playing position and quality of opposition on standardized relative distance covered in domestic women's field hockey: Implications for coaches. J Strength Cond Res 32(6): 1770–1777, 2018—The purpose of this study was to compare the standardized relative distance covered by the various playing positions (defenders, midfielders, and forwards) against different quality of opponents in domestic women's field hockey. Data were collected from 13 individuals competing for 1 team in the English Premier League across an 18-game season. Data were collected using porta...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Comparison Between Elite and Subelite Swimmers on Dry Land and Tumble Turn Leg Extensor Force-Time Characteristics
Jones, JV, Pyne, DB, Haff, GG, and Newton, RU. Comparison between elite and subelite swimmers on dry land and tumble turn leg extensor force-time characteristics. J Strength Cond Res 32(6): 1762–1769, 2018—Elite swimmers demonstrate faster swimming turn times that are potentially a result of having better strength-power characteristics than subelite swimmers. We quantified differences between dry-land and swimming turn force-time characteristics in elite swimmers and subelite swimmers. Subelite (11 males: 17.4 ± 0.6 years; 10 females: 17.1 ± 0.6 years) and elite swimmers (15 male: 23.2 ± 2....
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Cross-Sectional and Longitudinal Examination of Exercise Capacity in Elite Youth Badminton Players
Madsen, CM, Badault, B, and Nybo, L. Cross-sectional and longitudinal examination of exercise capacity in elite youth badminton players. J Strength Cond Res 32(6): 1754–1761, 2018—Badminton-specific speed and endurance performance was evaluated in both cross-sectional and longitudinal studies of elite youth players and compared with the physiological capacities of world top-50 singles players. The cross-sectional study involved 10 males in the category U15 ( (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

The Impact of Different Cross-Training Modalities on Performance and Injury-Related Variables in High School Cross Country Runners
Paquette, MR, Peel, SA, Smith, RE, Temme, M, and Dwyer, JN. The impact of different cross-training modalities on performance and injury-related variables in high school cross country runners. J Strength Cond Res 32(6): 1745–1753, 2018—There are many different types of aerobic cross-training modalities currently available. It is important to consider the effects that these different modalities have on running performance and injury risks. The purpose of this study was to compare movement quality, running economy (RE) and performance, injury-related biomechanical variables, and hip muscle strength before and afte...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Effect of Cadence on Time Trial Performance in Recreational Female Cyclists
Graham, PL, Zoeller, RF, Jacobs, PL, and Whitehurst, MA. Effect of cadence on time trial performance in recreational female cyclists. J Strength Cond Res 32(6): 1739–1744, 2018—The impact of pedaling cadence on cycling performance remains unresolved especially in female cyclists. The purpose of this study was to determine the effect of cadence on time trial (TT) performance in recreational female cyclists. Ten recreational female cyclists volunteered to participate in this study. Subjects performed 3 exercise sessions: 1 to assess peak oxygen uptake (V[Combining Dot Above]O2peak) and 2 TTs. Cadence was randomly...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Impact of Exercise-Induced Muscle Damage on Performance Test Outcomes in Elite Female Basketball Players
In conclusion, appropriate recovery should be considered the day after basketball-specific training sessions in elite basketball players. Furthermore, this study showed the usability of performance measures to detect changes during periods of EIMD, with acceptable reproducibility and minimal measurement error. (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Anthropometric Parameters, Age, and Agility as Performance Predictors in Elite Female Basketball Players
In conclusion, the results of the present study indicate that some anthropometric and physical fitness characteristics of female elite basketball teams and players are highly associated with performance-related parameters. In addition, a regression model has been developed to predict the performance of female basketball players. (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Influence of Team's Rank on Soccer Referees' External and Internal Match Loads During Official Matches
Castillo, D, Castagna, C, Cámara, J, Iturricastillo, A, and Yanci, J. Influence of team's rank on soccer referees' external and internal match loads during official matches. J Strength Cond Res 32(6): 1715–1722, 2018—The aim was to examine the external and the internal match loads (ML) of field referees (FRs) attending teams of different ranking during championship matches. Twenty FR who officiated in 30 official soccer matches (30 observations) participated in our study. The criteria for allocating the soccer referees' ML results were based on the teams' final league positions as follows: matches perfor...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Association of Physical and Technical Activities With Partial Match Status in a Soccer Professional Team
Moalla, W, Fessi, MS, Makni, E, Dellal, A, Filetti, C, Di Salvo, V, and Chamari, K. Association of physical and technical activities with partial match status in a soccer professional team. J Strength Cond Res 32(6): 1708–1714, 2018—The purpose of this study was to examine the association between physical and technical activities and partial match status (winning, drawing, or losing) in a professional soccer team over 2 seasons. Physical and technical activities of 52 official matches were collected and analyzed at each 15-minute interval, for each half (45 minutes), and full match (90 minutes) using a multiple...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Observation of Women Soccer Players' Physiology During a Single Season
Paulsen, KM, Butts, CL, and McDermott, BP. Observation of women soccer players' physiology during a single season. J Strength Cond Res 32(6): 1702–1707, 2018—The purpose of this study was to observe heart rate (HR) responses in match settings over the course of a conference season in National Collegiate Athletic Association Division I women's soccer. Twenty-one female collegiate soccer players were provided a HR monitor and instructed to wear it for the duration of match play. Player positions included 6 defenders (DEF), 6 midfielders (MID), and 9 forwards (FWD). Defenders were further identified as either cent...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Preseason Functional Test Scores Are Associated With Future Sports Injury in Female Collegiate Athletes
Brumitt, J, Heiderscheit, B, Manske, R, Niemuth, PE, Mattocks, A, and Rauh, MJ. Preseason functional test scores are associated with future sports injury in female collegiate athletes. J Strength Cond Res 32(6): 1692–1701, 2018—Recent prospective cohort studies have reported preseason functional performance test (FPT) measures and associations with future risk of injury; however, the findings associated with these studies have been equivocal. The purpose of this study was to determine the ability of a battery of FPTs as a preseason screening tool to identify female Division III (D III) collegiate athletes who m...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Differences in Glenohumeral Joint Rotation and Peak Power Output Between Super League and Championship Rugby League Players
Haines, MR. Differences in glenohumeral joint rotation and peak power output between Super League and Championship Rugby League players. J Strength Cond Res 32(6): 1685–1691, 2018—Rugby league is a high-intensity sport with large impact forces sustained during play, resulting in high prevalence of shoulder injury. Consequently, shoulder strength and player power are important considerations for injury prevention and performance. Additionally, professional teams regularly compete against semiprofessional teams, where differences in physical conditioning could be marked. The aim of this study was to test for diff...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Match Demands of Senior and Junior Players During International Rugby League
This study aims to quantify and compare the positional game demands of international junior and senior rugby league competition for the first time. Global positioning system (GPS) and video analysis were used to track 118 elite male rugby league players (57 seniors aged 28.7 ± 4.4 years; 61 juniors aged 17.2 ± 0.5 years) over 10 international matches (6 senior; 4 junior) characterized as either forwards (n = 67) or backs (n = 51). There were significant increases in the offensive carries (0.18 cf. 0.09 n·min−1; r = 0.56) and defensive tackles (0.36 cf. 0.23 n·min−1; r = 0.3) between ...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Four-Week Unstructured Break Improved Athletic Performance in Collegiate Rugby Players
This study analyzed the changes in athletic performance and anthropometric characteristics in collegiate male club rugby athletes (n = 14) after a 4-week winter break. All measurements were collected before and after the break. Body composition was assessed by body mass index and hydrostatic weighing. Performance measurements were as follows: V[Combining Dot Above]O2max, vertical jump, 10-yard sprint, squat max, and bench press max. Before testing, each subject was acclimated to the protocols to reduce learning effects. During the 4-week break, no workouts were provided for the athletes; it was unsupervised and unstructure...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Effects of Cardiovascular Fitness and Body Composition on Maximal Core Temperature in Collegiate Football Players During Preseason
This study evaluated the effects of body mass index (BMI) and aerobic fitness (V[Combining Dot Above]O2max) on maximal core temperature values (Tcmax) in 17 National Collegiate Athletic Association Division III football players during preseason. The subjects included 9 backs (BKs) and 8 linemen (LM). V[Combining Dot Above]O2max testing was performed 1 week before preseason. Core temperature was monitored by ingestible sensor every 10 minutes during practices on day 4 (D1), day 5 (D2), day 7 (D3), and postacclimatization on day 14 (D4). Wet bulb globe temperature (WBGT) was recorded on each collection day. Independent, pair...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

What is the Value of a National Football League Draft Pick? An Analysis Based on Changes Made in the Collective Bargaining Agreement
Kraeutler, MJ, Carver, TJ, Belk, JW, and McCarty, EC. What is the value of a National Football League draft pick? An analysis based on changes made in the collective bargaining agreement. J Strength Cond Res 32(6): 1656–1661, 2018—The purpose of this study was to analyze and compare the value of players drafted in early rounds of the National Football League (NFL) Draft since the new collective bargaining agreement began in 2011. The NFL's player statistics database and database of player contract details were searched for players drafted in the first 3 rounds of the 2011 to 2013 NFL Drafts. Performance outcome...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Hyperactivity of the Sympatho-Adrenomedullary System Without Any Modification of the Hypothalamic-Pituitary-Adrenal Axis After Food Restriction Among High-Level Weightlifters
We examined the effects of 6 days of food restriction on salivary α-amylase (sAA), cortisol and dehydroepiandrostenedione (DHEA) awakening responses, psychological parameters and performance among 11 international weightlifters. Assessments were made at baseline (T1) and 6 days after a normal period of training while maintaining body weight (T2). Then, participants were assigned to 2 groups depending on whether they lost (Diet group) or maintained (Control group) their body mass. Anthropometric, psychological, physical, and physiological assessments were also realized 6 days (T3) after the restricted dietary period f...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Relationship Between Dryland Strength and Swimming Performance: Pull-Up Mechanics as a Predictor of Swimming Speed
This study aimed to examine the validity of the countermovement jump (CMJ) and the pull-up exercise as predictors of swimming performance. Twelve young male swimmers (Mean ± SD, 19 ± 3 years; 75 ± 10 kg; 180 ± 6 cm) with a homogenous level of performance (50-m freestyle time [50F]: 26.41 ± 1.44 seconds, coefficient of variance: 5.5%) participated in this study. Subjects performed a test of a single pull-up (PU) and a test of maximum number of pull-ups until muscular failure (PUF), and the mechanics of the ascending phase were recorded using a lineal force transducer. The height reached in...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Rating of Perceived Exertion as a Method of Volume Autoregulation Within a Periodized Program
Helms, ER, Cross, MR, Brown, SR, Storey, A, Cronin, J, and Zourdos, MC. Rating of perceived exertion as a method of volume autoregulation within a periodized program. J Strength Cond Res 32(6): 1627–1636, 2018—The purpose of this investigation was to observe how a rating of perceived exertion (RPE)-based autoregulation strategy impacted volume performed by powerlifters. Twelve (26 ± 7 years, n = 9 men, n = 3 women) nationally qualified powerlifters performed the back squat, bench press, and deadlift 3x per week on nonconsecutive days in a session order of hypertrophy, power, and then strength; for 3 week...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Improving Vertical Jump Profiles Through Prescribed Movement Plans
This study examines the effectiveness of prescribed workouts on improving the quality of movement during CMJ. The data set consists of 2,425 pairs of CMJ scans for high school, college, and professional athletes training at a privately owned facility. During each scan, a force plate recorded 3 ground reaction force (GRF) measurements known to impact CMJ performance: eccentric rate of force development (ERFD), average vertical concentric force (AVCF), and concentric vertical impulse (CVI). After an initial scan, coaches either assigned the athlete a specific 1- or 2-strength movement plan (treatment group) or instructed the...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Effect of Energy Drink Consumption on Power and Velocity of Selected Sport Performance Activities
Jacobson, BH, Hester, GM, Palmer, TB, Williams, K, Pope, ZK, Sellers, JH, Conchola, EC, Woolsey, C, and Estrada, C. Effect of energy drink consumption on power and velocity of selected sport performance activities. J Strength Cond Res 32(6): 1613–1618, 2018—Energy drinks (ED) comprise a multibillion dollar market focused on younger, active, and competitive individuals. Marketing includes claims of improved alertness and performance. The purpose of this study was to assess power (W) and velocity (m·s−1) of a simulated, isolated forehand stroke (FHS), and a countermovement vertical jump (CVJ) before ...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Effectiveness of Fish Oil Supplementation in Attenuating Exercise-Induced Muscle Damage in Women During Midfollicular and Midluteal Menstrual Phases
McKinley-Barnard, SK, Andre, TL, Gann, JJ, Hwang, PS, and Willoughby, DS. Effectiveness of fish oil supplementation in attenuating exercise-induced muscle damage in females during midfollicular and midluteal menstrual phases. J Strength Cond Res 32(6): 1601–1612, 2018—The purpose of this study was to determine whether the differences in estrogen levels during the female menstrual cycle and fish oil supplementation would attenuate eccentric exercise-induced muscle damage and delayed-onset muscle soreness (DOMS). In a double-blind fashion, 22 physically active females (20.9 ± 1.4 years, 63.5 ± 9.0 k...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Resistance Training Is Associated With Higher Bone Mineral Density Among Young Adult Male Distance Runners Independent of Physiological Factors
Duplanty, AA, Levitt, DE, Hill, DW, McFarlin, BK, DiMarco, NM, and Vingren, JL. Resistance training is associated with higher bone mineral density among young adult male distance runners independent of physiological factors. J Strength Cond Res 32(6): 1594–1600, 2018—Low bone mineral density (BMD) in male distance runners is common and could be modulated by a host of biomarkers involved in the dynamic balance of bone tissue. In contrast, resistance training can increase BMD; however, the efficacy of resistance training in protecting BMD in distance runners has not been elucidated. The aim of this study was to i...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Investigation of the Effects of High-Intensity, Intermittent Exercise and Unanticipation on Trunk and Lower Limb Biomechanics During a Side-Cutting Maneuver Using Statistical Parametric Mapping
Whyte, EF, Richter, C, O'Connor, S, and Moran, KA. Investigation of the effects of high-intensity, intermittent exercise and unanticipation on trunk and lower limb biomechanics during a side-cutting maneuver using statistical parametric mapping. J Strength Cond Res 32(6): 1583–1593, 2018—Anterior cruciate ligament (ACL) injuries frequently occur during side-cutting maneuvers when fatigued or reacting to the sporting environment. Trunk and hip biomechanics are proposed to influence ACL loading during these activities. However, the effects of fatigue and unanticipation on the biomechanics of the kinetic chain may...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Variability of Plyometric and Ballistic Exercise Technique Maintains Jump Performance
Chandler, PT, Greig, M, Comfort, P, and McMahon, JJ. Variability of plyometric and ballistic exercise technique maintains jump performance. J Strength Cond Res 32(6): 1571–1582, 2018—The aim of this study was to investigate changes in vertical jump technique over the course of a training session. Twelve plyometric and ballistic exercise–trained male athletes (age = 23.4 ± 4.6 years, body mass = 78.7 ± 18.8 kg, height = 177.1 ± 9.0 cm) performed 3 sets of 10 repetitions of drop jump (DJ), rebound jump (RJ) and squat jump (SJ). Each exercise was analyzed from touchdown to peak joint fle...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Kinetic Determinants of Reactive Strength in Highly Trained Sprint Athletes
Douglas, J, Pearson, S, Ross, A, and McGuigan, M. Kinetic determinants of reactive strength in highly trained sprint athletes. J Strength Cond Res 32(6): 1562–1570, 2018—The purpose of this study was to determine the braking and propulsive phase kinetic variables underpinning reactive strength in highly trained sprint athletes in comparison with a nonsprint–trained control group. Twelve highly trained sprint athletes and 12 nonsprint–trained participants performed drop jumps (DJs) from 0.25, 0.50, and 0.75 m onto a force plate. One familiarization session was followed by an experimental testing sess...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Effects of Combined Strength and Endurance Training on Physical Performance and Biomarkers of Healthy Young Women
Kyröläinen, H, Hackney, AC, Salminen, R, Repola, J, Häkkinen, K, and Haimi, J. Effects of combined strength and endurance training on physical performance and biomarkers of healthy young women. J Strength Cond Res 32(6): 1554–1561, 2018—Cardiovascular fitness has decreased and obesity has increased in young adults worldwide during the last 10 years. Therefore, there is an urgent need to find out optimal exercise training programs for improving physical performance and health outcomes, especially among sedentary women. Subjects were 25- to 30-year-old women with a very low physical activity, and 6...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Quantitative Analysis of Proximal and Distal Kinetic Chain Musculature During Dynamic Exercises
Oliver, GD, Washington, JK, Barfield, JW, Gascon, SS, and Gilmer, G. Quantitative analysis of proximal and distal kinetic chain musculature during dynamic exercises. J Strength Cond Res 32(6): 1545–1553, 2018—Proximal to distal sequencing for the dynamic movement of throwing is dependent on the movement and stability of the lumbopelvic-hip complex (LPHC) and scapula. Although the need for proximal stability for distal mobility has been vastly documented, pre-throwing programs tend to focus on the traditional rotator cuff activation exercises before long toss. Thus, it was the purpose of this study to describe m...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Reliability Characteristics and Applicability of a Repeated Sprint Ability Test in Young Male Soccer Players
Castagna, C, Lorenzo, F, Krustrup, P, Fernandes-da-Silva, J, Póvoas, SCA, Bernardini, A, and D'Ottavio, S. Reliability characteristics and applicability of a repeated sprint ability test in young male soccer players. J Strength Cond Res 32(6): 1538–1544, 2018—The aim of this study was to examine the usefulness and reliability characteristics of a repeated sprint ability test considering 5 line sprints of 30 m interspersed with 30 seconds of active recovery in nonelite, outfield, young, male soccer players. Twenty-six (age, 14.9 ± 1.2 years; height, 1.72 ± 0.12 cm; body mass, 62.2 ± 5...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

A Resisted Sprint Improves Rate of Force Development During a 20-m Sprint in Athletes
This study examined the effect of a resisted sprint on 20-m sprinting kinetics. After a standardized warm-up, 23 (male = 10, female = 13) Division I basketball players completed 3 maximal 20-m sprint trials while tethered to a robotic resistance device. The first sprint (S1) used the minimal, necessary resistance (1 kg) to detect peak (PK) and average (AVG) sprinting power (P), velocity (V), and force (F); peak rate of force production (RFD) was also calculated. The second sprint (S2) was completed against a load equal to approximately 5% of the athlete's body mass. Minimal resistance (1 kg) was again used for the final sp...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Shod vs. Barefoot Effects on Force and Power Development During a Conventional Deadlift
Hammer, ME, Meir, RA, Whitting, JW, and Crowley-McHattan, ZJ. Shod vs. barefoot effects on force and power development during a conventional deadlift. J Strength Cond Res 32(6): 1525–1530, 2018—The kinetics of a conventional deadlift in shod (S) vs. unshod (US) footwear conditions in 10 male participants (mean ± SD, age = 27.0 ± 5.8 years; body mass = 78.7 ± 11.5 kg; height = 175.8 ± 8.2 cm; 1 repetition maximum [1RM] deadlift = 155.8 ± 25.8 kg) was assessed in 2 testing sessions. A counterbalanced, cross-over experimental design was used with different loads (60 and 80% 1RM)....
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

The Effects of Moderate- Versus High-Load Resistance Training on Muscle Growth, Body Composition, and Performance in Collegiate Women
Cholewa, JM, Rossi, FE, MacDonald, C, Hewins, A, Gallo, S, Micenski, A, Norton, L, and Campbell, BI. The effects of moderate- versus high-load resistance training on muscle growth, body composition, and performance in collegiate women. J Strength Cond Res 32(6): 1511–1524, 2018—Twenty young women (20.3 + 1.5 years, 164 + 6 cm, 68.7 + 13.8 kg) without prior structured resistance training experience were recruited for this study. Body composition (BodPod), compartmental water (Bioelectrical Impedance), 7-site skinfold, and arm and thigh cross-sectional area (CSA) were assessed before and after 8-week training. Pe...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Comparison Between Bench Press Throw and Ballistic Push-up Tests to Assess Upper-Body Power in Trained Individuals
Bartolomei, S, Nigro, F, Ruggeri, S, Malagoli Lanzoni, I, Ciacci, S, Merni, F, Sadres, E, Hoffman, JR, and Semprini, G. Comparison between bench press throw and ballistic push-up tests to assess upper-body power in trained individuals. J Strength Cond Res 32(6): 1503–1510, 2018—The purpose of this study was to validate the ballistic push-up (BPU) test performed with hands on a force plate as a method to measure upper-body power. Twenty-eight experienced resistance-trained men (age = 25.4 ± 5.2 years; body mass = 78.5 ± 9.0 kg; body height = 179.6 ± 7.8 cm) performed, 2 days apart, a bench p...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Acute Cardiorespiratory and Metabolic Effects of a Sandbag Resistance Exercise Protocol
Ratamess, NA, Kang, J, Kuper, JD, O'Grady, EA, Ellis, NL, Vought, IT, Culleton, E, Bush, JA, and Faigenbaum, AD. Acute cardiorespiratory and metabolic effects of a sandbag resistance exercise protocol. J Strength Cond Res 32(6): 1491–1502, 2018—The purpose of this study was to examine the acute cardiorespiratory and metabolic effects of a sandbag (SB) resistance exercise protocol and compare the responses to time-matched treadmill running protocols. Eight healthy, resistance-trained men (21.1 ± 1.0 years; 86.1 ± 7.8 kg) completed 4 protocols of equal duration in random sequence: (a) SB, (b) treadm...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research