Physical and Physiological Demands of Elite International Female Field Hockey Players During Competitive Match Play
McGuinness, A, Malone, S, Petrakos, G, and Collins, K. The physical and physiological demands of elite international female field hockey players during competitive match play. J Strength Cond Res 33(11): 3105–3113, 2019—The aim of the current investigation was to quantify the physical and physiological demands of elite international female field hockey match play across halves of play. Thirty-eight participants (24 ± 5 years; 173 ± 5 cm; 72 ± 5 kg) took part in 19 competitive matches during the 2014–2015 season. Participants were monitored with global positioning system technology and...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Aerobic Fitness in Top-Class Soccer Referees
Castagna, C, Bizzini, M, Araújo Póvoas, SC, Schenk, K, Büsser, G, and D'Ottavio, S. Aerobic fitness in top-class soccer referees. J Strength Cond Res 33(11): 3098–3104, 2019—The aim of this study was to examine the aerobic fitness status of top-class male soccer officials using a cross-sectional design and known population group constructs. Fifty-two field referees (FRs, age 38.4 ± 3.3 years; height 181 ± 5.6 cm; body mass 76.8 ± 6.8 kg; body mass index [BMI] 23.4 ± 1.7 kg·m−2; body fat 20.4 ± 3.6%; and international refereeing experience 5 &plu...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Fatigue in U12 Soccer-7 Players During Repeated 1-Day Tournament Games—A Pilot Study
Sanchez-Sanchez, J, Sanchez, M, Hernandez, D, Ramirez-Campillo, R, Martínez, C, and Nakamura, FY. Fatigue in U12 Soccer-7 players during repeated 1-day tournament games—a pilot study. J Strength Cond Res 33(11): 3092–3097, 2019—The aim of this study was to describe and compare the distances and displacement speeds of U12 Soccer-7 athletes during 4 tournament Soccer-7 games (TG) played in less than 24 hours (experimental condition) with those recorded during 2 league Soccer-7 games (LG) with 24 hours of rest before the match (control condition). Ten participants (age = 10.3 ± 0.5 years) were ...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Case Study: Sleep and Injury in Elite Soccer—A Mixed Method Approach
Nédélec, M, Leduc, C, Dawson, B, Guilhem, G, and Dupont, G. Case study: sleep and injury in elite soccer. A mixed method approach. J Strength Cond Res 33(11): 3085–3091, 2019—This case study allowed an examination of the link between sleep and injury occurrence in an elite male soccer player competing in French League 1 and Union of European Football Associations matches. During 4 months, a mixed method approach was used, combining actigraphic sleep assessment with qualitative interviews on a daily basis. Three injuries were reported over the study period. Sleep onset latency (SOL), both in the si...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Influence of Biological Maturity on the Match Performance of 8- to 16-Year-Old, Elite, Male, Youth Soccer Players
Goto, H, Morris, JG, and Nevill, ME. Influence of biological maturity on the match performance of 8- to 16-year-old, elite, male, youth soccer players. J Strength Cond Res 33(11): 3078–3084, 2019—The aim of this study was to examine the influence of biological maturity on match performance in elite, youth, male soccer players. The participants were 80 Premier League Academy outfield players (8–16 years old). Biological maturity was determined by calculating estimated chronological age at peak height velocity. The U9 and U10 squads played 6-a-side and the U11-U16 squads played 11-a-side interacademy matche...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Monitoring Blood Biomarkers and Training Load Throughout a Collegiate Soccer Season
Huggins, RA, Fortunati, AR, Curtis, RM, Looney, DP, West, CA, Lee, EC, Fragala, MS, Hall, ML, and Casa, DJ. Monitoring blood biomarkers and training load throughout a collegiate soccer season. J Strength Cond Res 33(11): 3065–3077, 2019—This observational study aimed to characterize the responses of a comprehensive panel of biomarkers, observed ranges, training load (TL) metrics, and performance throughout the collegiate soccer season (August–November). Biomarkers (n = 92) were collected before the start of pre-season (PS), in-season weeks (W)1, W4, W8, and W12 in NCAA Division I male soccer players (n = ...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Strength and Sprint Time Changes in Response to Repeated Shuttles Between the Wickets During Batting in Cricket
Christie CJ, Sheppard B, Goble D, Pote L, and Noakes TD. Strength and sprint time changes in response to repeated shuttles between the wickets during batting in cricket. J Strength Cond Res 33(11): 3056–3064, 2019—No studies have investigated the impact of repeated sprints between the wickets on lower-limb strength and sprint performance. Therefore, the purpose of this study was to assess changes in knee extensor (EXT) and flexor (FLEX) strength after repeated sprints between the wickets and to relate these to changes in sprint times. Twenty batters completed 2 conditions: one was high-volume running (HVR-twelv...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Body Composition Assessment in Female National Collegiate Athletic Association Division I Softball Athletes as a Function of Playing Position Across a Multiyear Time Frame
Peart, A, Wadsworth, D, Washington, J, and Oliver, G. Body composition assessment in female National Collegiate Athletic Association Division I softball athletes as a function of playing position across a multiyear time frame. J Strength Cond Res 33(11): 3049–3055, 2019—The purpose of this study was to record changes in total body mass, lean body mass (LBM), fat mass (FM), and body fat percentage (BF%) in female National Collegiate Athletic Association (NCAA) Division I level softball athletes over a multiyear time frame using dual-energy x-ray absorptiometry (iDXA). Forty-two (20.36 ± 1.59 years) NCAA D...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Influence of Reactive and Maximum Strength Indicators on Sprint Performance
Healy, R, Smyth, C, Kenny, IC, and Harrison, AJ. Influence of reactive and maximum strength indicators on sprint performance. J Strength Cond Res 33(11): 3039–3048, 2019—The primary aim of this study was to assess the relationship between reactive and maximal strength measures with 40 m sprint performance and mechanical properties. Fourteen male and 14 female sprinters participated in this study. On the first day, subjects performed 40 m sprints with 10-m split times recorded in addition to maximal theoretical velocity, maximal theoretical force and peak horizontal power, which were calculated from force–...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

New Tool to Control and Monitor Weighted Vest Training Load for Sprinting and Jumping in Soccer
This study presents a new tool to individualize the training load for resisted sprinting and jumping using weighted vest in soccer players and to develop the whole force-velocity spectrum according to the objectives of the different periods of the season. (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Baseline Assessments of Strength and Balance Performance and Bilateral Asymmetries in Collegiate Athletes
Dai, B, Layer, J, Vertz, C, Hinshaw, T, Cook, R, Li, Y, and Sha, Z. Baseline assessments of strength and balance performance and bilateral asymmetries in collegiate athletes. J Strength Cond Res 33(11): 3015–3029, 2019—Injuries to upper and lower extremities comprise more than 70% of the total injuries in collegiate athletes. Establishing normative data of upper and lower extremity strength and balance may help guide postinjury rehabilitation and return-to-play decisions. The purposes of the current study were to develop the normative data of performance and bilateral asymmetries during 4 upper and lower extrem...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Sex Differences in Resting Metabolic Rate Among Athletes
Jagim, AR, Camic, CL, Askow, A, Luedke, J, Erickson, J, Kerksick, CM, Jones, MT, and Oliver, JM. Sex differences in resting metabolic rate among athletes. J Strength Cond Res 33(11): 3008–3014, 2019—The purpose of this study was to compare differences in resting metabolic rate (RMR) between sexes in Division III National Collegiate Athletic Association (NCAA) collegiate athletes and to identify predictors of RMR. Sixty-eight male (M) (age: 20.1 ± 1.5 years; height: 181.8 ± 5.9 cm; body mass (BM): 93.7 ± 16.3 kg; and body fat%: 16.3 ± 8.6%) and 48 female (F) athletes (age: 19.4 &plusm...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Methodological Considerations on the Relationship Between the 1,500-m Rowing Ergometer Performance and Vertical Jump in National-Level Adolescent Rowers
Maciejewski, H, Rahmani, A, Chorin, F, Lardy, J, Samozino, P, and Ratel, S. Methodological considerations on the relationship between the 1,500-m rowing ergometer performance and vertical jump in national-level adolescent rowers. J Strength Cond Res 33(11): 3000–3007, 2019—The purpose of this study was to investigate whether 3 different approaches for evaluating squat jump performance were correlated with rowing ergometer performance in elite adolescent rowers. Fourteen young male competitive rowers (15.3 ± 0.6 years), who took part in the French rowing national championships, performed a 1,500-m all-out...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Acute Effects of Constant-Angle and Constant-Torque Static Stretching on Passive Stiffness of the Posterior Hip and Thigh Muscles in Healthy, Young and Old Men
Palmer, TB. Acute effects of constant-angle and constant-torque static stretching on passive stiffness of the posterior hip and thigh muscles in healthy, young and old men. J Strength Cond Res 33(11): 2991–2999, 2019—The purpose of this study was to examine the acute effects of constant-angle (CA) and constant-torque (CT) static stretching on passive stiffness of the posterior hip and thigh muscles in healthy, young and old men. Fifteen young (25 ± 3 years) and 15 old (71 ± 4 years) men underwent 2 passive straight-leg raise (SLR) assessments before and after 8 minutes of CA and CT stretching usin...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Static Stretch Performed After Strength Training Session Induces Hypotensive Response in Trained Men
In conclusion, strength and conditioning professionals can prescribe static SE after RT if the goal is to reduce blood pressure after training. (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Construct Validity of Two Different Methods of Scoring and Performing Push-ups
Clemons, J. Construct validity of two different methods of scoring and performing push-ups. J Strength Cond Res 33(11): 2971–2980, 2019—The purpose of this investigation was to determine the construct validity of the standard push-ups (STPUs) and hand-release push-ups (HRPUs) by comparing them to the criterion measures of absolute strength (i.e., 1 repetition maximum [RM] bench press [BP]) and relative strength (1RM·body mass−1). Thirty-one, college-age males were recruited for the study. The HRPU was performed by lifting the palms from the floor between each push-up (PU), whereas the STPU only req...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Validity of Combination Use of Activity Record and Accelerometry to Measure Free-Living Total Energy Expenditure in Female Endurance Runners
Yoshida, A, Ishikawa-Takata, K, Tanaka, S, Suzuki, N, Nakae, S, Murata, H, Taguchi, M, and Higuchi, M. Validity of combination use of activity record and accelerometry to measure free-living total energy expenditure in female endurance runners. J Strength Cond Res 33(11): 2962–2970, 2019—Herein, we attempted to prove the validity of a new approach to assessing total energy expenditure (TEE) that combines activity recording and accelerometry in athletes. Eight female endurance runners participated in this study. We measured TEE over 8 days in the regular training season by using the doubly labeled water (DLW) me...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Assessing Asymmetries in Change of Direction Speed Performance: Application of Change of Direction Deficit
Dos'Santos, T, Thomas, C, Jones, PA, and Comfort, P. Assessing asymmetries in change of direction speed performance; application of change of direction deficit. J Strength Cond Res 33(11): 2953–2961, 2019—The aims of this study were to quantify asymmetries in change of direction (COD) performance using completion time and COD deficit, and determine its influence on asymmetry profiling of COD ability. A secondary aim was to evaluate the relationship between linear speed, 505 time, and COD deficit. Forty-three youth netball athletes (age: 15.4 ± 1.1 years, height: 1.71 ± 0.06 m, and mass: 63.3 &plus...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Comparison of Psychological and Physiological Responses to Imposed vs. Self-selected High-Intensity Interval Training
This study compared physiological and perceptual responses between imposed and self-selected HIIE. Fourteen adults (age = 24 ± 3 years) unfamiliar with HIIE initially performed ramp exercise to exhaustion to measure maximal oxygen uptake (VO2max) followed by 2 subsequent sessions whose order was randomized. Imposed HIIE consisted of eight 60 seconds bouts at 80 percent peak power output (%PPO) separated by 60 seconds recovery at 10 %PPO. Self-selected HIIE (HIIESS) followed the same structure, but participants freely selected intensity in increments of 10 %PPO to achieve a rating of perceived exertion (RPE) ≥7. D...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Influence of Power Clean Ability and Training Age on Adaptations to Weightlifting-Style Training
James, LP, Comfort, P, Suchomel, TJ, Kelly, VG, Beckman, EM, and Haff, GG. Influence of power clean ability and training age on adaptations to weightlifting-style training. J Strength Cond Res 33(11): 2936–2944, 2019—The purpose of this investigation was to determine whether weightlifting actions are a viable method for improving athletic performance among weaker, inexperienced lifters when compared with individuals with a greater power clean (PC) result, and hence weightlifting ability and experience. Two groups of males with distinctly different PC performances (higher performance [HP]: N = 8; body mass [BM] ...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Intrasession and Intersession Reliability of Countermovement Jump Testing in Division-I Volleyball Athletes
This study assessed intrasession and intersession reliability of CMJ variables in NCAA D-I volleyball athletes. Eleven female volleyball players (age = 19.8 ± 0.8 years, height = 1.75 ± 0.07 m, body mass = 71.6 ± 8.9 kg) performed twice weekly CMJ testing on force platforms across 14 weeks of training. Dependent variables were CMJ height (CMJH), reactive strength index modified (RSIMOD), relative peak power (rPP), and countermovement depth (CM depth). Intraclass correlation coefficients (ICCs), coefficient of variation (CV), and typical error (TE) were calculated, along with Pearson correlation coeffic...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

The Relationship Between Adductor Squeeze Strength, Subjective Markers of Recovery and Training Load in Elite Rugby Players
Tiernan, C, Lyons, M, Comyns, T, Nevill, AM, and Warrington, G. The relationship between adductor squeeze strength, subjective markers of recovery and training load in elite Rugby players. J Strength Cond Res 33(11): 2926–2931, 2019—The adductor squeeze strength test has become a popular training monitoring marker, particularly in team sports. The aim of this study was to investigate the relationship between adductor squeeze strength scores, subjective markers of recovery and training load in elite Rugby Union players, because of limited research in this area. Nineteen elite male Rugby Union players completed d...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Appendicular Body Composition Analysis: Validity of Bioelectrical Impedance Analysis Compared With Dual-Energy X-Ray Absorptiometry in Division I College Athletes
Brewer, GJ, Blue, MNM, Hirsch, KR, Peterjohn, AM, and Smith-Ryan, AE. Appendicular body composition analysis: Validity of bioelectrical impedance analysis compared with dual-energy x-ray absorptiometry in Division I college athletes. J Strength Cond Res 33(11): 2920–2925, 2019—The purpose of this study was to evaluate validity of appendicular body composition measurements measured from a multifrequency bioelectrical impedance analysis (MF-BIA) compared with a dual-energy x-ray absorptiometry (DXA) criterion in Division I athletes. One hundred sixty male (n = 44) and female (n = 116) collegiate athletes were enr...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

A Retrospective Analysis of Collegiate Athlete Blood Biomarkers at Moderate Altitude
This study aimed to describe the changes in blood biomarkers in collegiate football (FB) (n = 31) and cross-country (XC) (n = 29; 16 women [FXC], 13 men [MXC]) athletes across a competitive season while training and living at a moderate altitude (1,655 m). This study used a database of previously collected hematological (complete blood count and serum ferritin) and muscle damage (lactate dehydrogenase and creatine kinase) blood biomarkers. Data were analyzed both within and between groups using linear mixed-model and variance component analyses, alpha = 0.05. All 3 groups had significant but different patterns of change in...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Three-Year Longitudinal Fitness Tracking in Top-Level Competitive Youth Ice Hockey Players
Cordingley, DM, Sirant, L, MacDonald, PB, and Leiter, JR. Three-year longitudinal fitness tracking in top-level competitive youth ice hockey players. J Strength Cond Res 33(11): 2909–2912, 2019—The purpose of this retrospective review was to report the physical and physiological development of top-level competitive male youth hockey players for 3 consecutive years (13, 14, and 15 years of age). Before each hockey season, the athletes (n = 103) underwent a fitness testing combine to assess aerobic, anaerobic, and musculoskeletal fitness. The tests performed included the height, body mass, body fat percentage det...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Anticipatory Salivary Cortisol and State Anxiety Before Competition Predict Match Outcome in Division I Collegiate Wrestlers
Cintineo, HP and Arent, SM. Anticipatory salivary cortisol and state anxiety before competition predict match outcome in Division I collegiate wrestlers. J Strength Cond Res 33(11): 2905–2908, 2019—Anticipation of exercise and other stressors has been shown to result in physiological and psychological changes, which include increased levels of cortisol and anxiety. Combat sports, in particular, typically elicit robust anticipatory responses because of the distinct nature of these sports. Therefore, the purpose of this investigation was to examine the relationship between state anxiety scores, anticipatory corti...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Practitioner Perceptions of Evidence-Based Practice in Elite Sport in the United States of America
Fullagar, HHK, Harper, LD, Govus, A, McCunn, R, Eisenmann, J, and McCall, A. Practitioner perceptions of evidence-based practice in elite sport in the United States of America. J Strength Cond Res 33(11): 2897–2904, 2019—Practitioners' perceptions regarding the use and effectiveness of research evidence in sport is not well understood. The purpose of the present study was to examine practitioners' perceptions around the use, implementation, and barriers to evidence-based practice (EBP) in sport science in the United States of America (USA). A survey (28 items) was completed by 67 full-time staff who were a phys...
Source: Journal of Strength and Conditioning Research - October 23, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Low-Load vs. High-Load Resistance Training to Failure on One Repetition Maximum Strength and Body Composition in Untrained Women: Addendum
No abstract available (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Addendum Source Type: research

Effects of Judo Training on Bones: A Systematic Literature Review
This article provides useful information on bone for health sport scientists, coaches, and practitioners, stimulating future research lines on judo. In particular, coaches and physical trainers should consider introducing judo fall techniques in their training plans to prevent fall-related injuries, especially relevant in the older population. Conversely, coaches are urged to carefully control weight cycling dietary habits of their athletes, which can produce serious metabolic responses on bones. (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Brief Review Source Type: research

Swim-Specific Resistance Training: A Systematic Review
In conclusion, tether forces showed the greatest associations with swimming performance, although the efficacy of tethered swimming as an SSWPT method is yet to be confirmed. Further research should focus on the effects of SDLRT to verify the greater transfer of dry land resistance practices to swimming performance, with inertial training being potentially more beneficial than traditional resistance training. (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Brief Review Source Type: research

Characterization of the Physical Fitness of Police Officers: A Systematic Review
Marins, EF, David, GB, and Del Vecchio, FB. Characterization of the physical fitness of police officers: a systematic review. J Strength Cond Res 33(10): 2860–2874, 2019—Physical fitness tests (e.g., aerobic power, muscular endurance, and flexibility tests) are commonly used to assess the ability of police officers to perform work-related tasks. The purpose of this study was to describe, from a systematic literature review, data related to police physical fitness. The research was conducted in 5 electronic databases to search for original studies that measured physical fitness (aerobic and anaerobic capacity, s...
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Brief Review Source Type: research

Scientific Basis for Eccentric Quasi-Isometric Resistance Training: A Narrative Review
Oranchuk, DJ, Storey, AG, Nelson, AR, and Cronin, JB. The scientific basis for eccentric quasi-isometric resistance training: A narrative review. J Strength Cond Res 33(10): 2846–2859, 2019—Eccentric quasi-isometric (EQI) resistance training involves holding a submaximal, yielding isometric contraction until fatigue causes muscle lengthening and then maximally resisting through a range of motion. Practitioners contend that EQI contractions are a powerful tool for the development of several physical qualities important to health and sports performance. In addition, several sports involve regular quasi-isometric ...
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Brief Review Source Type: research

Influence of Morphology and Strength on Front Crawl Swimming Speed in Junior and Youth Age-Group Swimmers
This study, conducted in 2 male age groups, was aimed at analyzing the influence of body properties, dry-land strength and swimming strength on 50-m crawl (VCrawl). We examined 2 competitive groups, Youth (20.6 ± 1.05) and Junior (17.3 ± 0.59), based on (a) body mass (BM) and lean body mass (LBM), body height (BH) and total body length (TBL), and arm span (AS); (b) countermovement jump (CMJ) and maximum isometric strength of elbow and knee joints; and (c) tethered crawl strength. We hypothesized that a higher relationship of strength indices in younger swimmers in VCrawl and tethered swimming would be a bette...
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Low-Intensity Resistance Exercise Reduces Hyperglycemia and Enhances Glucose Control Over a 24-Hour Period in Women With Type 2 Diabetes
Cruz, LC, Teixeira-Araujo, AA, Andrade, KTP, Rocha, TCOG, Puga, GM, and Moreira, SR. Low intensity resistance exercise reduces hyperglycemia and enhances glucose control over a 24-hour period in women with type 2 diabetes. J Strength Cond Res 33(10): 2826–2835, 2019—The study herein aimed to compare glucose concentration and hyperglycemic responses of 24 hours after resistance exercise (RE) performed in different intensities in patients with type 2 diabetes (T2D). Twelve women with T2D (55.2 ± 4.0 years; 70.1 ± 11.4 kg; and 155.7 ± 3.3 cm) performed 4 experimental sessions divided into 2 bl...
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Relationship Between Selected Physical Qualities, Bowling Kinematics, and Pace Bowling Skill in Club-Standard Cricketers
This study sought to determine these interrelationships. Thirty-one male club-standard pace bowlers completed 3 test sessions on separate occasions 4–7 days apart. The first testing session comprised an 8-over pace bowling assessment, where bowling skill and selected bowling kinematics were measured. A physical test battery was completed over the remaining 2 sessions. Peak and mean ball release (BR) speed were related with 1 repetition maximum pull-up strength (rs = 0.56, p = 0.005) and correlated with 20-m sprint time (rs = −0.42, p = 0.022; rs = −0.37, p = 0.044, respectively). Mean radial error was ass...
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Planning Training Workload in Football Using Small-Sided Games' Density
Sangnier, S, Cotte, T, Brachet, O, Coquart, J, and Tourny, C. Planning training workload in football using small-sided games density. J Strength Cond Res 33(10): 2801–2811, 2019—To develop the physical qualities, the small-sided games' (SSGs) density may be essential in soccer. Small-sided games are games in which the pitch size, players' number, and rules are different to those for traditional soccer matches. The purpose was to assess the relation between training workload and SSGs' density. The 33 densities data (41 practice games and 3 full games) were analyzed through global positioning system (GPS) data co...
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Global Training Effects of Trained and Untrained Muscles With Youth Can be Maintained During 4 Weeks of Detraining
In conclusion, youth HL-LR and LL-HR global training effects of trained and untrained limbs demonstrate similar benefits (pre- to detraining) and decrements (post- to detraining) with detraining. The findings emphasize that training any muscle group in a child can have positive global implications for improved strength and power that can persist over baseline measures for at least a month. (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Effects of the Competitive Season on the Isokinetic Muscle Parameters Changes in World-Class Handball Players
Maurelli, O, Bernard, PL, Dubois, R, Ahmaidi, S, and Prioux, J. Effects of the competitive season on the isokinetic muscle parameters changes in world-class handball players. J Strength Cond Res 33(10): 2778–2787, 2019—The aim of this study is to investigate the effects of the competitive season on isokinetic muscular parameters of the lower limbs in world-class handball players. Nineteen, male, world-class, handball players (age, 26.6 ± 5.4 years) participated in the study. Two bilateral isokinetic tests of knee joint flexors (H; hamstring) and extensors (Q; quadriceps) were performed in the beginning a...
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Physiological Pattern Changes in Response to a Simulated Competition in Elite Women's Artistic Gymnasts
Isacco, L, Ennequin, G, Cassirame, J, and Tordi, N. Physiological pattern changes in response to a simulated competition in elite women's artistic gymnasts. J Strength Cond Res 33(10): 2768–2777, 2019—The outstanding progress in women's artistic gymnastics in recent decades has led to increased technical and physiological demands. The aim of this study was to investigate (a) the physiological demands of elite French gymnasts and (b) the impact of a competitive routine on physiological pattern changes. Fourteen French elite female gymnasts performed anthropometric measurements, physical fitness tests, and a simu...
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Upper and Lower Body Power Are Strong Predictors for Selection of Male Junior National Volleyball Team Players
Tsoukos, A, Drikos, S, Brown, LE, Sotiropoulos, K, Veligekas, P, and Bogdanis, GC. Upper and lower body power are strong predictors for selection of male junior National volleyball team players. J Strength Cond Res 33(10): 2760–2767, 2019—The purpose of this study was to determine whether a battery of anthropometric and lower and upper body strength and speed and power tests predicted selection of young volleyball players for a Junior National Team by expert coaches. Fifty-two male junior volleyball players (14.8 ± 0.5 years, height: 1.84 ± 0.05 m, body mass: 72.5 ± 7.1 kg) took part in a t...
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Effects of Repeated Sprints With Changes of Direction on Youth Soccer Player's Performance: Impact of Initial Fitness Level
In conclusion, although RS-COD training may positively affect RS and change of direction performance, its effects may vary according to the initial aerobic fitness of youth soccer players, with trivial effect on intermittent endurance in high-aerobic fitness players and possible beneficial effect on low-aerobic fitness players. (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Acute Effect of Aerobic and Strength Exercise on Heart Rate Variability and Baroreflex Sensitivity in Men With Autonomic Dysfunction
This study compared heart rate variability (HRV) and baroreflex sensitivity (BRS) responses to acute aerobic exercise (AE) and strength exercise (SE) in men with CADysf. Twenty men were assigned into control (n = 10: 33.8 ± 3.0 years; 23.7 ± 1.5 kg·m−2) and CADysf (n = 10: 36.2 ± 9.8 years; 28.4 ± 2.6 kg·m−2) groups. Cardiac autonomic dysfunction underwent AE, SE, and a nonexercise control day (control session [CTL]) in a randomized, counter-balanced order. Heart rate variability and BRS were assessed in a supine position during 25 minutes of recovery after AE, SE, and ...
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Short-Term Training and Detraining Effects of Supervised vs. Unsupervised Resistance Exercise in Aging Adults
This study compared the effects of a 4-week supervised (SUP) resistance training program and unsupervised (UNSUP) resistance training program followed by 12 weeks of detraining (DET). Thirty-six healthy aging adults (age: 53.6 ± 3.6 years; body mass index: 28.3 ± 5.1 kg·m−2) were randomly allocated to an SUP group (n = 17) or a UNSUP group (n = 19). Participants completed 3 training sessions per week using resistance bands and body weight movements. Measures of physical performance were administered at baseline, at the end of the training program, and after the DET period. Function was assessed w...
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Using Perceptual and Neuromuscular Responses to Estimate Mechanical Changes During Continuous Sets in the Bench Press
This study analyzed the effectiveness of the OMNI-RES (0–10) and the electromyographic signal for monitoring changes in the movement velocity during a set to muscular failure performed with different relative loads in the bench press (BP) exercise. Ten males (30.8 ± 5.7 years) were evaluated on 8 separate days with 48 hours of rest between sessions. After determining the 1 repetition maximum value, participants performed 7 sets to failure with the following relative loads ranges: 30 (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

A Repeated Power Training Enhances Fatigue Resistance While Reducing Intraset Fluctuations
In conclusion, RPA training represents an effective method to mainly improve fatigue resistance together with the novel finding of a better consistency in performance (measured as reduced intraset power fluctuations) at the end of a dynamic repeated effort. (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Pole Dancing for Fitness: The Physiological and Metabolic Demand of a 60-Minute Class
Nicholas, JC, McDonald, KA, Peeling, P, Jackson, B, Dimmock, JA, Alderson, JA, and Donnelly, CJ. Pole dancing for fitness: The physiological and metabolic demand of a 60-minute class. J Strength Cond Res 33(10): 2704–2710, 2019—Little is understood about the acute physiological or metabolic demand of pole dancing classes. As such, the aims of this study were to quantify the demands of a standardized recreational pole dancing class, classifying outcomes according to American College of Sports Medicine (ACSM) exercise-intensity guidelines, and to explore differences in physiological and metabolic measures between...
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Combined Effects of Static Stretching and Electrical Stimulation on Joint Range of Motion and Muscle Strength
Mizuno, T. Combined effects of static stretching and electrical stimulation on joint range of motion and muscle strength. J Strength Cond Res 33(10): 2694–2703, 2019—The purpose of this study was to examine the effects of the combination of static stretching (SS) and electrical stimulation (ES) for 8 weeks on joint range of motion (ROM), muscle strength, and muscle architecture. Thirty-one subjects were divided into 3 groups: the SS combined with ES (SS + ES) group, SS group, and control group. The SS + ES group performed calf stretching simultaneously with ES to the gastrocnemius medialis, whereas the SS group...
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Order Effects of Resistance and Stretching Exercises on Heart Rate Variability and Blood Pressure in Healthy Adults
In conclusion, this study indicated that SE followed by RE promotes a reduction in LFnu and RMSSDnu, with trivial to small magnitude decreases in SBP. Therefore, performing SE either before or between RE would be an important exercise prescription recommendation to lower cardiac load and consequently greater safety. (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Effects of Practical Blood Flow Restriction Training on Adolescent Lower-Body Strength
Luebbers, PE, Witte, EV, and Oshel, JQ. Effects of practical blood flow restriction training on adolescent lower-body strength. J Strength Cond Res 33(10): 2674–2683, 2019—The purpose of this study was to examine the effects of a practical blood flow restriction (BFR) training program on lower-body strength of high school weightlifters. Twenty-five students were divided into 3 groups. For 6 weeks, each group completed the same resistance training program with the exception of the parallel back squat exercise (2 d·wk−1), which was different for each group. One group (HI) completed a traditional high...
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Original Research Source Type: research

Isometric Midthigh Pull Performance Is Associated With Athletic Performance and Sprinting Kinetics in Division I Men and Women's Basketball Players
Townsend, JR, Bender, D, Vantrease, WC, Hudy, J, Huet, K, Williamson, C, Bechke, E, Serafini, PR, and Mangine, GT. Isometric midthigh pull performance is associated with athletic performance and sprinting kinetics in Division I men and women's basketball players. J Strength Cond Res 33(10): 2665–2673, 2019— The relationships between isometric mid-thigh pull (IMTP) force, athletic performance measures, and sprint kinetics in Division I men's and women's basketball players were investigated. Twenty-three (male = 8, female = 15) Division 1 basketball players completed a maximal 20-m sprint trial while tethered to ...
Source: Journal of Strength and Conditioning Research - September 25, 2019 Category: Sports Medicine Tags: Original Research Source Type: research