Effect of Progressive Calisthenic Push-up Training on Muscle Strength and Thickness
Kotarsky, CJ, Christensen, BK, Miller, JS, and Hackney, KJ. Effect of progressive calisthenic push-up training on muscle strength and thickness. J Strength Cond Res 32(3): 651–659, 2018—Calisthenics, a form of resistance training, continue to increase in popularity; however, few studies have examined their effectiveness for muscle strength improvement. The purpose of this study was to determine whether progressive calisthenic push-up training (PUSH) is comparable with traditional bench press training (BENCH) as a technique for increasing muscle strength and thickness. Twenty-three healthy, moderately trained me...
Source: Journal of Strength and Conditioning Research - February 22, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Delayed Effects of a Low-Volume, Power-Type Resistance Exercise Session on Explosive Performance
This study examined the delayed effects of a power-type training session on explosive performance. Seventeen well-trained male power and team sport athletes (age: 22.7 ± 5.5 years, height: 181 ± 8 cm, body mass: 80.7 ± 8.6 kg, body fat: 9.2 ± 1.7%, 1 repetition maximum (1RM) half-squat: 163 ± 29 kg) performed 4 sessions (2 experimental and 2 control) 1 week apart in a randomized and counterbalanced order. Explosive performance was assessed before, 24 and 48 hours after a low-volume, power-type training session (5 × 4 jump squats at 40% 1RM with 3 minutes rest), as well as before and...
Source: Journal of Strength and Conditioning Research - February 22, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Concurrent Training Followed by Detraining: Does the Resistance Training Intensity Matter?
Sousa, AC, Marinho, DA, Gil, MH, Izquierdo, M, Rodríguez-Rosell, D, Neiva, HP, and Marques, MC. Concurrent training followed by detraining: does the resistance training intensity matter? J Strength Cond Res 32(3): 632–642, 2018—The aim of this study was to analyze the training and detraining (DT) effects of concurrent aerobic training and resistance training against 3 different external loads on strength and aerobic variables. Thirty-two men were randomly assigned to 4 groups: low-load (LLG, n = 9), moderate-load (MLG, n = 9), high-load (HLG, n = 8), and control group (CG, n = 6). Resistance training con...
Source: Journal of Strength and Conditioning Research - February 22, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Effects of Sprint Interval Training With Active Recovery vs. Endurance Training on Aerobic and Anaerobic Power, Muscular Strength, and Sprint Ability
This study compared sprint interval training with active recovery (SITAR) to moderate-intensity endurance training (ET) in aerobic and anaerobic power, muscular strength, and sprint time results. Forty-two recreationally active adults were randomly assigned to a SITAR or ET group. Both groups trained 3× per week for 10 weeks at 75% of V[Combining Dot Above]O2max for 30 minutes weeks 1–4, with duration increasing to 35 minutes weeks 5–7 and 40 minutes weeks 8–10. While ET ran on a 400-m track without rest for the full training session, SITAR sprinted until the 200-m mark and recovered with fast walki...
Source: Journal of Strength and Conditioning Research - February 22, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Six Sessions of Sprint Interval Training Improves Running Performance in Trained Athletes
Koral, J, Oranchuk, DJ, Herrera, R, and Millet, GY. Six sessions of sprint interval training improves running performance in trained athletes. J Strength Cond Res 32(3): 617–623, 2018—Sprint interval training (SIT) is gaining popularity with endurance athletes. Various studies have shown that SIT allows for similar or greater endurance, strength, and power performance improvements than traditional endurance training but demands less time and volume. One of the main limitations in SIT research is that most studies were performed in a laboratory using expensive treadmills or ergometers. The aim of this study was ...
Source: Journal of Strength and Conditioning Research - February 22, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Potential Utility of a Loaded Treadmill Protocol for Tactical Athletes
Swearingen, JT, Weiss, LW, Smith, WA, Stephenson, MD, and Schilling, BK. Potential utility of a loaded treadmill protocol for tactical athletes. J Strength Cond Res 32(3): 610–616, 2018—Aerobic capacity is an important variable for tactical athletes, with V[Combining Dot Above]O2max being the most direct way of estimating it in a laboratory setting. A mode-specific protocol involving fixed-weight, torso-borne loads was assessed in the current study. On 4 separate days, 15 men (age 22.1 ± 2.7 years, mass 85.1 ± 10.6 kg, height 179.0 ± 7.7 cm) performed a weighted treadmill walking protocol (...
Source: Journal of Strength and Conditioning Research - February 22, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Biomechanical Analysis of Suspension Training Push-Up
Giancotti, GF, Fusco, A, Varalda, C, Capranica, L, and Cortis, C. Biomechanical analysis of suspension training push-up. J Strength Cond Res 32(3): 602–609, 2018—The aims of this study were to evaluate the load distribution between upper and lower extremities during suspension training (ST) push-up at different lengths of ST device and to predict useful equations to estimate the training load. After giving informed consent for participation, 25 subjects (17 men and 8 women; age = 28.1 ± 5.2 years; body mass = 69.4 ± 14.3 kg; height = 171.6 ± 11.3 cm; body mass index (BMI) = 23.4 ± 3....
Source: Journal of Strength and Conditioning Research - February 22, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Gluteus Maximus and Hamstring Activation During Selected Weight-Bearing Resistance Exercises
McCurdy, K, Walker, J, and Yuen, D. Gluteus maximus and hamstring activation during selected weight-bearing resistance exercises. J Strength Cond Res 32(3): 594–601, 2018—The purpose of this study was to compare the gluteus maximus (GM) and hamstring group (HG) electromyographic (EMG) activation levels among selected weight-bearing resistance exercises. Eighteen young adult females with previous resistance training experience completed the study. Strength was assessed on the bilateral squat (BS) (3 repetition maximum [RM]), modified single-leg squat (MSLS) (3RM), and stiff-leg deadlift (SLDL) (8RM) to determine...
Source: Journal of Strength and Conditioning Research - February 22, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Electromyographic Comparison of Barbell Deadlift, Hex Bar Deadlift, and Hip Thrust Exercises: A Cross-Over Study
Andersen, V, Fimland, MS, Mo, D-A, Iversen, VM, Vederhus, T, Rockland Hellebø, LR, Nordaune, KI, and Saeterbakken, AH. Electromyographic comparison of barbell deadlift, hex bar deadlift, and hip thrust exercises: a cross-over study. J Strength Cond Res 32(3): 587–593, 2018—The aim of the study was to compare the muscle activation level of the gluteus maximus, biceps femoris, and erector spinae in the hip thrust, barbell deadlift, and hex bar deadlift; each of which are compound resisted hip extension exercises. After 2 familiarization sessions, 13 resistance-trained men performed a 1 repetition maximum i...
Source: Journal of Strength and Conditioning Research - February 22, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Muscle Twitch Torque During Two Different in Volume Isometric Exercise Protocols: Fatigue Effects on Postactivation Potentiation
Xenofondos, A, Bassa, E, Vrabas, IS, Kotzamanidis, C, and Patikas, D. Muscle twitch torque during two different in volume isometric exercise protocols: fatigue effects on postactivation potentiation. J Strength Cond Res 32(2): 578–586, 2018—The purpose of this study was to quantify the effect of the contraction duration of 2 isometric exercise protocols on the postactivation potentiation of 14 well-trained men (age: 22.6 ± 2.8 years, height: 180.3 ± 5.9 cm, and body mass: 72.3 ± 37.9 kg). The protocols consisted of 4 × 6 maximal plantar flexions, of 3-second (P3) or 6-second (P6) dura...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Acute Capsaicin Supplementation Improves 1,500-m Running Time-Trial Performance and Rate of Perceived Exertion in Physically Active Adults
de Freitas, MC, Cholewa, JM, Gobbo, LA, de Oliveira, JVNS, Lira, FS, and Rossi, FE. Acute capsaicin supplementation improves 1,500-m running time-trial performance and rate of perceived exertion in physically active adults. J Strength Cond Res 32(2): 572–577, 2018—The purpose of this study was to investigate the acute effect of capsaicin supplementation on performance, rate of perceived exertion (RPE), and blood lactate concentrations during short-duration running in physically active adults. Ten physically active men (age = 23.5 ± 1.9 years, mass = 78.3 ± 12.4 kg, and height = 177.9 ± 5.9 ...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Comparison of Exercise Performance in Recreationally Active and Masters Athlete Women
Stone, MS, Glenn, JM, Vincenzo, JL, and Gray, M. Comparison of exercise performance in recreationally active and masters athlete women. J Strength Cond Res 32(2): 565–571, 2018—Master athletes (MA) are an understudied, ever-growing cohort. As such, it is important to examine how age affects muscular power and fatigability. Of particular interest is muscular power maintenance and fatigue mitigation of MA compared with young, healthy adults. The purpose of this investigation was to examine the differences in peak power, average power, total work (WRK), and fatigue index (FI) between recreationally active (RA) you...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Effect of Load Carriage on Tactical Performance in Special Weapons and Tactics Operators
Thomas, JM, Pohl, MB, Shapiro, R, Keeler, J, and Abel, MG. Effect of load carriage on tactical performance in special weapons and tactics operators. J Strength Cond Res 32(2): 554–564, 2018—Special weapons and tactics (SWAT) operators are specially trained personnel that are required to carry equipment to perform high-risk tasks. Given the need to carry this equipment, it is important to understand the potentially deleterious effect that the additional load may have on tactical performance. Furthermore, it is important to identify physical fitness characteristics that are associated with the potential decrement...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Effects of Different Resistance Training Systems on Muscular Strength and Hypertrophy in Resistance-Trained Older Women
Ribeiro, AS, Aguiar, AF, Schoenfeld, BJ, Nunes, JP, Cavalcanti, EF, Cadore, EL, and Cyrino, ES. Effects of different resistance training systems on muscular strength and hypertrophy in resistance-trained older women. J Strength Cond Res 32(2): 545–553, 2018—The purpose of this study was to investigate the effect of resistance training (RT) performed in a pyramid (PR) vs. constant (CT) load system on muscular strength and hypertrophy in resistance-trained older women. Thirty-three older women (69.7 ± 5.9 years, 69.1 ± 15.0 kg, 156.6 ± 6.2 cm, and 28.1 ± 5.4 kg·m−2) were r...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Differences by Ending Rounds and Other Rounds in Time-Motion Analysis of Mixed Martial Arts: Implications for Assessment and Training
This study aimed to support training program development through the comparison of performance analysis of professionals mixed martial art (MMA) athletes in the bouts that were not finished by points. Using digital recordings of each bout, we analyzed 1,564 rounds (678 bouts) which were separated by ending and other rounds. Our results indicated that knockout/technical knockout is the main outcome that defines the ending round (≈60%); however, there is a higher frequency of ending by submission on the first and second rounds (>30%). Bouts ending during the first or second rounds had shorter total time and standing...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Isometric Midthigh Pull Reliability and Relationship to Deadlift One Repetition Maximum
De Witt, JK, English, KL, Crowell, JB, Kalogera, KL, Guilliams, ME, Nieschwitz, BE, Hanson, AM, and Ploutz-Snyder, LL. Isometric midthigh pull reliability and relationship to deadlift one repetition maximum. J Strength Cond Res 32(2): 528–533, 2018—The purpose of this investigation was to examine the reliability of the isometric midthigh pull (IMTP) and the relationship between IMTP peak force and deadlift 1 repetition maximum (1RM). Nine subjects (5 men and 4 women; 40.6 ± 8.0 years; 1.72 ± 0.10 m; 75.6 ± 13.4 kg) participated in this study. Isometric midthigh pull and deadlift 1RM were bo...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Asymmetries in Isometric Force-Time Characteristics Are Not Detrimental to Change of Direction Speed
Dos'Santos, T, Thomas, C, Jones, PA, and Comfort, P. Asymmetries in isometric force-time characteristics are not detrimental to change of direction speed. J Strength Cond Res 32(2): 520–527, 2018—The purpose of this study was to determine the impact of between-limb asymmetries in isometric midthigh pull (IMTP) force-time characteristics on change of direction speed (CODS). Twenty multisport collegiate athletes (mean ± SD: age: 21.0 ± 1.9 years; mass: 78.7 ± 8.9 kg; and height: 1.77 ± 0.04 m) performed 3 unilateral stance IMTP trials per limb and 3 modified 505 CODS trials each side t...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Effect of Bench Press Load Knowledge on Repetitions, Rating of Perceived Exertion, and Attentional Focus
Beaudoin, CM, Cox, Z, Dundore, T, Thomas, T, Kim, J, and Pillivant, D. Effect of bench press load knowledge on repetitions, rating of perceived exertion, and attentional focus. J Strength Cond Res 32(2): 514–519, 2018—Few studies have examined the role of the teleoanticipation during resistance training. The purpose of this study was to examine the effect of bench press (BP) load knowledge on repetitions completed, ratings of perceived exertion (RPEs), and attentional focus (% associative). Thirty-six recreationally active resistance-trained men (n = 25) and women (n = 11) participated in this study (age = 20.9...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Biomechanical Methods to Quantify Muscle Effort During Resistance Exercise
Chiu, LZF. Biomechanical methods to quantify muscle effort during resistance exercise. J Strength Cond Res 32(2): 502–513, 2018—Muscle hypertrophy and strength adaptations elicited by resistance training are dependent on the force exerted by active muscles. As an exercise may use many muscles, determining force for individual muscles or muscle groupings is important to understand the relation between an exercise and these adaptations. Muscle effort—the amount of force or a surrogate measure related to the amount of force exerted during a task—can be quantified using biomechanical methods. The purpos...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Brief Review Source Type: research

Reliability of Near-Infrared Spectroscopy for Measuring Intermittent Handgrip Contractions in Sport Climbers
Baláš, J, Kodejška, J, Krupková, D, Hannsmann, J, and Fryer, S. Reliability of near-infrared spectroscopy for measuring intermittent handgrip contractions in sport climbers. J Strength Cond Res 32(2): 494–501, 2018—The use of near-infrared spectroscopy (NIRS) to investigate muscle oxygenation changes during physical tasks such as rock climbing has rapidly increased within recent years; yet, there is no known measure of reliability. The current study aimed to determine intersession reliability and minimal detectable change (MDC) of continuous wave NIRS parameters during intermittent h...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Validity of an Isometric Midthigh Pull Dynamometer in Male Youth Athletes
Till, K, Morris, R, Stokes, K, Trewartha, G, Twist, C, Dobbin, N, Hunwicks, R, and Jones, B. Validity of an isometric midthigh pull dynamometer in male youth athletes. J Strength Cond Res 32(2): 490–493, 2018—The purpose of this study was to investigate the validity of an isometric midthigh pull dynamometer against a criterion measure (i.e., 1,000-Hz force platform) for assessing muscle strength in male youth athletes. Twenty-two male adolescent (age 15.3 ± 0.5 years) rugby league players performed 4 isometric midthigh pull efforts (i.e., 2 on the dynamometer and 2 on the force platform) separated by 5-m...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Technical Report Source Type: research

Acute Effects of the Elevation Training Mask on Strength Performance in Recreational Weight lifters
Jagim, AR, Dominy, TA, Camic, CL, Wright, G, Doberstein, S, Jones, MT, and Oliver, JM. Acute effects of the elevation training mask on strength performance in recreational weightlifters. J Strength Cond Res 32(2): 482–489, 2018—The Elevation Training Mask 2.0 (ETM) is a novel device that purportedly simulates altitude training. The purpose of this study was to investigate the acute effects of the ETM on resistance exercise performance, metabolic stress markers, and ratings of mental fatigue. Twenty male recreational weight lifters completed 2 training sessions of back squat and bench press (6 sets of 10 repetit...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

The Maximal Mechanical Capabilities of Leg Muscles to Generate Velocity and Power Improve at Altitude
This study aimed (a) to analyze the effect of an acute exposure to terrestrial altitude on the force-velocity relationship parameters (maximum force [F0], maximum velocity [V0], and maximum power [P0]) during a loaded squat jump (SJ), and (b) to compare unloaded SJ and countermovement jump (CMJ) performance between sea level and altitude conditions. Seventeen international swimmers were tested at sea level (295 m asl) and 7 days later at terrestrial altitude (2,320 m asl) during their first 24 hours of altitude exposure. The maximum values of force and velocity were recorded during a loaded SJ (25–100% of body weight...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Mechanical Demands of the Hang Power Clean and Jump Shrug: A Joint-Level Perspective
This study provides important novel information about the mechanical demands of 2 commonly used exercises and should be considered in the design of resistance training programs that aim to improve the explosiveness of the lower extremity joints. (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Short-Term Training Cessation as a Method of Tapering to Improve Maximal Strength
Pritchard, HJ, Barnes, MJ, Stewart, RJC, Keogh, JWL, and McGuigan, MR. Short-term training cessation as a method of tapering to improve maximal strength. J Strength Cond Res 32(2): 458–465, 2018—The aim of this study was to determine the effects of 2 different durations of training cessation on upper- and lower-body maximal strength performance and to investigate the mechanisms underlying performance changes following short-term training cessation. Eight resistance trained males (23.8 ± 5.4 years, 79.6 ± 10.2 kg, 1.80 ± 0.06 m, relative deadlift 1 repetition maximum of 1.90 ± 0.30 ti...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Effects of Exercise Modality During Additional “High-Intensity Interval Training” on Aerobic Fitness and Strength in Powerlifting and Strongman Athletes
In conclusion, our results support enhanced strength and aerobic fitness irrespective of exercise modality (e.g., traditional aerobic and resistance training). However, powerlifters and strongman athletes wishing to enhance their aerobic fitness should consider HIIT using an aerobic HIIT mode. (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Hydration Status, Executive Function, and Response to Orthostatism After a 118-km Mountain Race: Are They Interrelated?
Martínez-Navarro, I, Chiva-Bartoll, O, Hernando, B, Collado, E, Porcar, V, and Hernando, C. Hydration status, executive function and response to orthostatism after a 118-km mountain race: are they interrelated? J Strength Cond Res 32(2): 441–449, 2018—The present study aimed to explore whether blood pressure (BP) and heart rate (HR) variability (HRV) responsiveness to orthostatism, jointly with executive function (EF) performance, was diminished after an ultra-endurance mountain race. Besides, we wanted to assess whether hydration status was related to either performance or the abovementioned alterations...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Association Between Anaerobic Metabolic Demands During Simulated Brazilian Jiu-Jitsu Combat and Specific Jiu-Jitsu Anaerobic Performance Test
Villar, R, Gillis, J, Santana, G, Pinheiro, DS, and Almeida, ALRA. Association between anaerobic metabolic demands during simulated Brazilian jiu-jitsu combat and specific jiu-jitsu anaerobic performance test. J Strength Cond Res 32(2): 432–440, 2018—The aims of this study were to design a specific Jiu-Jitsu anaerobic performance test (JJAPT) and investigate the relationship between blood lactate ([La]), heart rate (HR), and rating of perceived exertion (RPE) during simulated Brazilian Jiu-Jitsu combat (SBJJC) and JJAPT. Nine male elite Brazilian medium heavy weight athletes performed a 10-minute SBJJC and JJAP...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Multiple Repeated Sprint Ability Test for Badminton Players Involving Four Changes of Direction: Validity and Reliability (Part 1)
Phomsoupha, M, Berger, Q, and Laffaye, G. Multiple repeated sprint ability test for badminton players involving four changes of direction: validity and reliability (part 1). J Strength Cond Res 32(2): 423–431, 2018—The purpose of this study was: (a) to develop a new sport-specific, repeated-sprint ability test involving 4 changes of direction, namely, the multiple repeated sprint ability (MRSAB) test for badminton players; (b) to determine its validity by comparing the results of 5 different skill levels; and (c) to assess the link between the new test and neuromuscular lower limb and physiological variables. F...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Effect of Jump Interval Training on Kinematics of the Lower Limbs and Running Economy
In conclusion, the results suggest that JIT induces important changes in the kinematics of the lower limbs of recreational runners, but the changes do not affect RE. (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Lack of Influence of Muscular Performance Parameters on Spatiotemporal Adaptations With Increased Running Velocity
This study aimed to analyze the influence of muscular performance parameters on spatiotemporal gait characteristics during running when gradually increasing speed. Fifty-one recreationally trained male endurance runners (age, 28 ± 8 years) voluntarily participated in this study. Subjects performed a battery of jumping tests (squat jump, countermovement jump, and 20-cm drop jump), and after that, the subjects performed an incremental running test (10–20 km·h−1) on a motorized treadmill. Spatiotemporal parameters were measured using the OptoGait system. Cluster k-means analysis grouped subjects acco...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Predictive Validity of National Basketball Association Draft Combine on Future Performance
In conclusion, the NBA Draft Combine has value for predicting future performance of players. (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

The Age-Related Performance Decline in Ironman Triathlon Starts Earlier in Swimming Than in Cycling and Running
Käch, I, Rüst, CA, Nikolaidis, PT, Rosemann, T, and Knechtle, B. The age-related performance decline in Ironman triathlon starts earlier in swimming than in cycling and running. J Strength Cond Res 32(2): 379–395, 2018—In Ironman triathlon, the number of overall male and female finishers increased in the past 30 years, while an improvement in performance has been reported. Studies concluding these numbers only analyzed the top 10 athletes per age group instead of all finishers; therefore, a selection bias might have occurred. The aim of this study was to investigate participation, performance, and the...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Physiological Profile of Male Competitive and Recreational Surfers
Furness, J, Hing, W, Sheppard, JM, Newcomer, S, Schram, B, and Climstein, M. Physiological profile of male competitive and recreational surfers. J Strength Cond Res 32(2): 372–378, 2018—Surfing consists of both high- and low-intensity paddling of varying durations, using both the aerobic and anaerobic systems. Surf-specific physiological studies lack adequate group sample sizes, and V[Combining Dot Above]O2peak values are yet to determine the differences between competitive and recreational surfers. The purpose of this study was therefore to provide a comprehensive physiological profile of both recreational and...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Relationship Among Repeated Sprint Ability, Chronological Age, and Puberty in Young Soccer Players
Perroni, F, Pintus, A, Frandino, M, Guidetti, L, and Baldari, C. Relationship among repeated sprint ability, chronological age, and puberty in young soccer players. J Strength Cond Res 32(2): 364–371, 2018—The aim of this study was to analyzed the relationship of repeated sprint ability (RSA) with chronological age and puberty in 100 young soccer players (age: 13 ± 3 years–160 ± 33 months-; height: 159 ± 16 cm, mass: 49.7 ± 14.1 kg; body mass index [BMI] 19.2 ± 2.5 kg/m2) grouped on “Pulcini” (9–10 years), “Esordienti” (11–12 years), &...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Preseason Maximal Aerobic Power in Professional Soccer Players Among Different Divisions
Marcos, MA, Koulla, PM, and Anthos, ZI. Preseason maximal aerobic power in professional soccer players among different divisions. J Strength Cond Res 32(2): 356–363, 2018—The purpose of this study was to examine and compare the anthropometric, maximal oxygen uptake (V[Combining Dot Above]O2max), and positional differences of first division (D1) professional football players from players of second (D2) and third (D3) divisions in Cyprus football leagues. Four hundred twenty-one professional male football players participated in this study. All subjects underwent anthropometric and body composition evaluation. In...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Combined Carbohydrate and Protein Ingestion During Australian Rules Football Matches and Training Sessions Does Not Reduce Fatigue or Accelerate Recovery Throughout a Weeklong Junior Tournament
Lee, NA, Fell, JW, Pitchford, NW, Hall, AH, Leveritt, MD, and Kitic, CM. Combined carbohydrate and protein ingestion during Australian rules football matches and training sessions does not reduce fatigue or accelerate recovery throughout a weeklong junior tournament. J Strength Cond Res 32(2): 344–355, 2018—Australian rules football (ARF) is a physically demanding sport that can induce high levels of fatigue. Fatigue may be intensified during periods where multiple matches are played with limited recovery time. Combined carbohydrate and protein (CHO + PRO) intake during physical activity may provide performance...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

The Physical and Athletic Performance Characteristics of Division I Collegiate Female Soccer Players by Position
Lockie, RG, Moreno, MR, Lazar, A, Orjalo, AJ, Giuliano, DV, Risso, FG, Davis, DL, Crelling, JB, Lockwood, JR, and Jalilvand, F. The physical and athletic performance characteristics of Division I collegiate female soccer players by position. J Strength Cond Res 32(2): 334–343, 2018—Playing positions in soccer can exhibit different movement demands during a match, contributing to variations in physical and performance characteristics. National Collegiate Athletic Association (NCAA) soccer features different substitution rules when compared to FIFA-sanctioned matches, which could influence each players' character...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Reliability and Validity of a Submaximal Warm-up Test for Monitoring Training Status in Professional Soccer Players
Rabbani, A, Kargarfard, M, and Twist, C. Reliability and validity of a submaximal warm-up test for monitoring training status in professional soccer players. J Strength Cond Res 32(2): 326–333, 2018—Two studies were conducted to assess the reliability and validity of a submaximal warm-up test (SWT) in professional soccer players. For the reliability study, 12 male players performed an SWT over 3 trials, with 1 week between trials. For the validity study, 14 players of the same team performed an SWT and a 30-15 intermittent fitness test (30-15IFT) 7 days apart. Week-to-week reliability in selected heart rate (HR...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Running Performance in Brazilian Professional Football Players During a Congested Match Schedule
Palucci Vieira, LH, Aquino, R, Lago-Peñas, C, Munhoz Martins, GH, Puggina, EF, and Barbieri, FA. Running performance in Brazilian professional football players during a congested match schedule. J Strength Cond Res 32(2): 313–325, 2018—The purpose of the study was to examine the influence of playing congested fixtures (2 matches a week) on running performance of Brazilian professional football players, pooled (all performance files regardless players' rotation between games) or individualized data treatment (including only files of athletes' who played pair(s) of noncongested–congested matches whic...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Performance Differences Among Skilled Soccer Players of Different Playing Positions During Vertical Jumping and Landing
Harry, JR, Barker, LA, James, CR, and Dufek, JS. Performance differences among skilled soccer players of different playing positions during vertical jumping and landing. J Strength Cond Res 32(2): 304–312, 2018—Both jumping and landing performance of skilled soccer players is diminished when task demands are increased. However, it is unclear if performance changes are specific to players of certain playing positions. Therefore, we assessed jumping and landing performance among skilled soccer players of different playing positions. Twenty-five National Collegiate Athletic Association (NCAA) Division 1 male socce...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Importance of Speed and Power in Elite Youth Soccer Depends on Maturation Status
Murtagh, CF, Brownlee, TE, O'Boyle, A, Morgans, R, Drust, B, and Erskine, RM. Importance of speed and power in elite youth soccer depends on maturation status. J Strength Cond Res 32(2): 297–303, 2018—Maturation status is a confounding factor when identifying talent in elite youth soccer players (ESP). By comparing performance of ESP and control participants (CON) matched for maturation status, the aims of our study were to establish the importance of acceleration, sprint, horizontal-forward jump, and vertical jump capabilities for determining elite soccer playing status at different stages of maturation. Elite...
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Effects of Plyometric and Directional Training on Speed and Jump Performance in Elite Youth Soccer Players
In conclusion, this study showed that short-term protocols (CODJ-G and COD-G) are important and able to give meaningful improvements on power and speed parameters in a specific soccer population. CODJ-G showed a larger effect in sprint and jump parameters compared with COD-G after the training protocol. This study offers important implications for designing COD and jumps training in elite soccer. (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - January 27, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Authors' Response
No abstract available (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - January 1, 2018 Category: Sports Medicine Tags: Manuscript Clarification Source Type: research

Inappropriate Methods and Flawed Conclusion in: Can Resistance Training Enhance the Rapid Force Development in Unloaded Dynamic Isoinertial Multijoint Movements? A Systematic Review
No abstract available (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - January 1, 2018 Category: Sports Medicine Tags: Manuscript Clarification Source Type: research

Effects of Two Different Training Periodization Models on Physical and Physiological Aspects of Elite Female Team Handball Players
Manchado, C, Cortell-Tormo, JM, and Tortosa-Martínez, J. Effects of two different training periodization models on physical and physiological aspects of elite female team handball players. J Strength Cond Res 32(1): 280–287, 2018—The aim of this study was to compare training-induced changes in selected physiological and physical team handball performance factors after 2 training periodization models: traditional periodization (TP) vs. block periodization (BP). Eleven female team handball players who played over 2 consecutive seasons for a Spanish first league team were assessed twice per season during a ...
Source: Journal of Strength and Conditioning Research - January 1, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Resistance Training Is Associated With Higher Lumbar Spine and Hip Bone Mineral Density in Competitive Male Cyclists
Mathis, SL, and Caputo, JL. Resistance training is associated with higher lumbar spine and hip bone mineral density in competitive male cyclists. J Strength Cond Res 32(1): 274–279, 2018—In contrast to other athletic activities, competitive cycling is associated with low areal bone mineral density (BMD). This investigation evaluated training and dietary factors associated with BMD in a sample of competitive male cyclists. Lumbar spine, total hip, femoral neck, and femoral trochanter BMD were measured with dual X-ray absorptiometry in 40 cyclists at the start of a cycling season. Participants reported weekly hou...
Source: Journal of Strength and Conditioning Research - January 1, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Factors Influencing Spike Jump Height in Female College Volleyball Players
Ikeda, Y, Sasaki, Y, and Hamano, R. Factors influencing spike jump height in female college volleyball players. J Strength Cond Res 32(1): 267–273, 2018—The purpose of this study was to examine factors influencing spike jump (SPJ) performance by female competitive volleyball players through comparisons of the kinematic data of SPJ with those of the standing long jump (SLJ) and vertical jump (VJ). Seventeen female competitive volleyball players were asked to perform SPJ, SLJ, and VJ. Motion data of SPJ including the approach phase were recorded. Regarding SLJ and VJ, jumping motion and ground reaction force were...
Source: Journal of Strength and Conditioning Research - January 1, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

The Relationship Between Trunk Rotation, Upper Quarter Dynamic Stability, and Pitch Velocity
Bullock, GS, Schmitt, AC, Chasse, PM, Little, BA, Diehl, LH, and Butler, RJ. The relationship between trunk rotation, upper quarter dynamic stability, and pitch velocity. J Strength Cond Res 32(1): 261–266, 2018—Understanding the relationship between upper quarter mobility, dynamic stability, and pitching velocity may be beneficial in elucidating underlying factors that affect pitching performance. The purpose of this study was to investigate upper trunk rotation mobility and upper quarter dynamic stability and their correlation to pitch velocity in NCAA Division I collegiate pitchers. We hypothesized that coll...
Source: Journal of Strength and Conditioning Research - January 1, 2018 Category: Sports Medicine Tags: Original Research Source Type: research

Relationships Between Concentric and Eccentric Strength and Countermovement Jump Performance in Resistance Trained Men
Bridgeman, LA, McGuigan, MR, Gill, ND, and Dulson, DK. Relationships between concentric and eccentric strength and countermovement jump performance in resistance trained men. J Strength Cond Res 32(1): 255–260, 2018—The purpose of this study was to investigate the relationships between concentric and eccentric peak force (PF) and countermovement jump (CMJ) performance in resistance trained men. Subjects were 12 men (mean ± SD; age: 25.4 ± 3.5 years; height: 177.2 ± 4.5 cm; mass: 84.0 ± 10.1 kg). The men were tested for concentric and eccentric PF using the Exerbotics squat device. Su...
Source: Journal of Strength and Conditioning Research - January 1, 2018 Category: Sports Medicine Tags: Short Research Report Source Type: research