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https://www.readbyqxmd.com/read/29324575/the-relationship-between-tennis-serve-velocity-and-select-performance-measures
#1
Matthew J Hayes, Dirk R Spits, David G Watts, Vincent G Kelly
The purpose of this study was to determine if there was a relationship between tennis serve speed and isometric mid-thigh pull (IMTP) kinetic variables; countermovement jump height (CMJ Height), shoulder internal and external rotation strength and anthropometric measures in elite adolescent tennis players. Twenty-one elite junior tennis players from the Tennis Australia National Academy were recruited for this study (male, n = 12, female, n = 9). Correlations between the performance variables and peak tennis serve speed were calculated using a Pearson's product-moment correlation coefficient...
January 10, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29283690/how-fast-is-a-horizontal-squat-jump
#2
Pierre Samozino, Jean Romain Riviere, Jérémy Rossi, Jean-Benoit Morin, Pedro Jimenez-Reyes
Velocity strength training requires exercise modalities allowing athletes to reach very high movement velocity, which is limited during vertical movements involving body weight. PURPOSE: Our aim was to quantify the mechanical outputs developed during horizontal squat jumps, and notably the movement velocity, in comparison to vertical squat jumps with and without loads. METHODS: Thirteen healthy male athletes performed squat jumps without additional loads (SJ0), with a load of ~60% of body mass (SJ60) and during horizontal squat jumps performed lying down on a roller device with (AHSJ) and without (HSJ) a rubber band assistance...
December 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29276543/an-investigation-of-home-advantage-in-the-summer-paralympic-games
#3
Darryl Wilson, Girish Ramchandani
Purpose: There is a paucity of home advantage research set in the context of para-sport events. It is this gap in the knowledge that this paper addresses by investigating the prevalence and size of home advantage in the Summer Paralympic Games. Methods: Using a standardised measure of success, we compared the performances of nations when competing at home with their own performances away from home in the competition between 1960 and 2016. Both country-level and individual sport-level analyses were conducted for this time frame...
2017: Sport Sciences for Health
https://www.readbyqxmd.com/read/29199551/royal-sun-culinary-medicinal-mushroom-agaricus-brasiliensis-agaricomycetes-supplement-in-training-capacity-improvement-parameters
#4
Flávio F Silva, Guilherme A C de Oliveira, Hugo C Martins Costa, Wiliam C B Regis
People seek a greater quality of life and healthy aging that culminates in improved self-esteem and vitality in the performance of daily activities; this is generating a growing number of people enrolled in gyms in search of quick results. However, this training can result in physical and metabolic damage. During physical exercise, under conditions of oxidative stress, changes take place that lead to the onset of fatigue. The Agaricus brasiliensis mushroom is native to Brazil and has therapeutic potential, with widely studied antioxidant and immunomodulatory capabilities...
2017: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/29162467/return-to-play-after-injuries-a-survey-on-the-helpfulness-of-various-forms-of-assistance-in-the-shared-decision-making-process-in-semi-professional-athletes-in-germany
#5
Daniel Niederer, Jan Wilke, Lutz Vogt, Winfried Banzer
OBJECTIVE: To assess how different decision-guiding factors, such as health and performance related actuators, as well as evidence based guidelines, support the process-orientated final positive return to play (RTP) decision of head coaches responsible for semi-professional sport teams. DESIGN: Cross-sectional survey. SETTING: and Participants: A survey consisting of questions on the importance of different decision-guiding factors used when making the RTP decision following injuries was administered to and completed by 238 head coaches of semi-professional players' teams...
November 18, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/29158621/loaded-and-unloaded-jump-performance-of-top-level-volleyball-players-from-different-age-categories
#6
Katia Kitamura, Lucas Adriano Pereira, Ronaldo Kobal, Cesar Cavinato Cal Abad, Ronaldo Finotti, Fábio Yuzo Nakamura, Irineu Loturco
The aim of this study was to investigate the differences in loaded and unloaded jump performances between different age categories of top-level volleyball players from the same club. Forty-three volleyball players were divided into four age groups: under-17, under-19, under-21 and professional. Vertical jumping height for squat jump (SJ), countermovement jump (CMJ) and CMJ with arm swing (CMJa) and mean propulsive velocity (MPV) in the loaded jump squat exercise with 40% of the athlete's body mass were compared among the different age categories, considering body mass as a covariate...
September 2017: Biology of Sport
https://www.readbyqxmd.com/read/29112054/lower-extremity-stiffness-considerations-for-testing-performance-enhancement-and-injury-risk
#7
Jon Brazier, Sean Maloney, Chris Bishop, Paul J Read, Anthony N Turner
Brazier, J, Maloney, S, Bishop, C, Read, PJ, and Turner, AN. Lower extremity stiffness: considerations for testing, performance enhancement, and injury risk. J Strength Cond Res XX(X): 000-000, 2017-Force-deformation characteristics of the lower limb have been associated with athletic performance and may modulate the risk of injury. Despite these known associations, measurements of lower extremity stiffness are not commonly administered by strength and conditioning coaches. This review provides an overview of the available literature pertaining to the effects of lower extremity stiffness on physical performance and injury risk...
November 1, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29091479/case-study-the-effect-of-nutritional-intervention-on-body-composition-and-physical-performance-of-a-female-squash-player
#8
Christopher Rosimus
The body composition of a squash player may affect athletic performance as carrying excessive body fat may increase injury risk and impair agility and speed. This case study outlines the effect of a nutritional intervention on body composition, vitamin D status and physical performance of a female squash player. A structured, 6-week moderate energy-restricted diet (70-78% of Estimated Energy Requirement (EER) of 2300 kcal was implemented with weekly support. A daily supplement of vitamin D, omega 3 fatty acids, and a multivitamin/multimineral and whey protein was used...
November 1, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29065077/optimizing-half-squat-postactivation-potential-load-in-squat-jump-training-for-eliciting-relative-maximal-power-in-ski-jumpers
#9
Artur Gołaś, Michal Wilk, Petr Stastny, Adam Maszczyk, Katarzyna Pajerska, Adam Zając
Gołaś, A, Wilk, M, Stastny, P, Maszczyk, A, Pajerska, K, and Zając, A. Optimizing half squat postactivation potential load in squat jump training for eliciting relative maximal power in ski jumpers. J Strength Cond Res 31(11): 3010-3017, 2017-Training load manipulation in a single workout session can increase or decrease training effectiveness in terms of athletes' strength or power gains. In ski jumping, the complex training that elicits maximal power gains may take advantage of the postactivation potentiation (PAP) mechanism...
November 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29060408/features-selection-for-bayes-classification-of-prolonged-fatigue-on-rectus-femoris-muscle
#10
Fauzani N Jamaluddin, Siti A Ahmad, Samsul Bahari Mohd Noor, Wan Zuha Wan Hassan, Y Azhar
Sports training is very important to athletes in improving and maintaining their performances. It commonly involves high intensity exercise and requires longer time for fatigue to recover, compares to normal activity. During training, adequate rest is essential to allow recuperation and build body strength. Unfortunately, inadequate rest exposes the body to prolonged fatigue (PF). Hence, this condition needs to be managed accordingly to avoid chronic fatigue syndrome. Recent findings indicate that there are strong characteristics on surface EMG under PF conditions...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29037636/effects-of-kinesio-taping%C3%A2-on-knee-function-and-pain-in-athletes-with-patellofemoral-pain-syndrome
#11
Elaheh Aghapour, Fahimeh Kamali, Ehsan Sinaei
OBJECTIVE: To compare the knee performance and pain in athletes with patellofemoral pain syndrome (PFPS) before and after applying Kinesio Tape® (KT) on vastus medialis obliquus (VMO) muscle. PARTICIPANTS: Fifteen participants (10 females, five males) with unilateral PFPS were examined and compared under taped and untaped conditions. INTERVENTION: VMO of the involved leg was taped from origin to insertion, with 75% of KT's maximal length tension...
October 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29027102/current-status-of-the-female-athlete-triad-update-and-future-directions
#12
REVIEW
Mary Jane De Souza, Kristen J Koltun, Clara V Etter, Emily A Southmayd
PURPOSE OF REVIEW: This review provides an update on the primary clinical sequelae of the Female Athlete Triad. RECENT FINDINGS: Scientific advancements have contributed to improve understanding of Triad-related conditions, including leptin's role as a potential neuroendocrine link between energy status and reproductive function. Use of finite element analysis of HRpQCT imaging has provided a more accurate assessment of bone geometry and bone strength and may be clinically relevant...
December 2017: Current Osteoporosis Reports
https://www.readbyqxmd.com/read/29023331/effects-of-plyometric-training-on-components-of-physical-fitness-in-prepuberal-male-soccer-athletes-the-role-of-surface-instability
#13
Yassine Negra, Helmi Chaabene, Senda Sammoud, Raja Bouguezzi, Bessem Mkaouer, Younés Hachana, Urs Granacher
Negra, Y, Chaabene, H, Sammoud, S, Bouguezzi, R, Mkaouer, B, Hachana, Y, and Granacher, U. Effects of plyometric training on components of physical fitness in prepuberal male soccer athletes: the role of surface instability. J Strength Cond Res XX(X): 000-000, 2017-Previous studies contrasted the effects of plyometric training (PT) conducted on stable vs. unstable surfaces on components of physical fitness in child and adolescent soccer players. Depending on the training modality (stable vs. unstable), specific performance improvements were found for jump (stable PT) and balance performances (unstable PT)...
October 10, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29023328/strength-and-conditioning-habits-of-competitive-distance-runners
#14
Richard C Blagrove, Nicola Brown, Glyn Howatson, Philip R Hayes
Blagrove, RC, Brown, N, Howatson, G, and Hayes, PR. Strength and conditioning habits of competitive distance runners. J Strength Cond Res XX(X): 000-000, 2017-Targeted strength and conditioning (S&C) programs can potentially improve performance and reduce injury risk factors in competitive runners. However, S&C practices of distance runners are unknown. This study aimed to explore S&C practices of competitive middle- and long-distance runners and examined whether reported frequency of injuries was influenced by training behaviors...
October 10, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28968288/specific-physical-training-in-elite-male-team-handball
#15
Herbert Wagner, Manuel Gierlinger, Nermin Adzamija, Samuel Ajayi, David W Bacharach, Serge P von Duvillard
Wagner, H, Gierlinger, M, Adzamija, N, Ajayi, S, Bacharach, DW, and von Duvillard, SP. Specific physical training in elite male team handball. J Strength Cond Res 31(11): 3083-3093, 2017-Specific physical training in elite team handball is essential for optimal player's performance; however, scientific knowledge is generally based on temporary training studies with subelite athletes. Therefore, the aim of the study was to analyze the effects of specific physical training in an elite male handball team over the entire season...
November 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28956639/gender-may-have-an-influence-on-the-relationship-between-functional-movement-screen-scores-and-gait-parameters-in-elite-junior-athletes-a-pilot-study
#16
N Magyari, V Szakács, C Bartha, B Szilágyi, K Galamb, M O Magyar, T Hortobágyi, R M Kiss, J Tihanyi, J Négyesi
Aims The aim of this study was to examine the effects of gender on the relationship between Functional Movement Screen (FMS) and treadmill-based gait parameters. Methods Twenty elite junior athletes (10 women and 10 men) performed the FMS tests and gait analysis at a fixed speed. Between-gender differences were calculated for the relationship between FMS test scores and gait parameters, such as foot rotation, step length, and length of gait line. Results Gender did not affect the relationship between FMS and treadmill-based gait parameters...
September 1, 2017: Physiology International
https://www.readbyqxmd.com/read/28933713/adaptations-associated-with-an-after-school-strength-and-conditioning-program-in-middle-school-aged-boys-a-quasi-experimental-design
#17
Brennan J Thompson, Matt S Stock, Jacob A Mota, Alexander S Drusch, Ryan N DeFranco, Tyler R Cook, Matthew A Hamm
High-intensity strength and conditioning programs aimed at improving youth performance are becoming increasingly prevalent. The purpose of this study was to investigate the effects of a 16-week after-school strength and conditioning program on performance and body composition in middle-school-aged boys. Subjects in the training group (n = 16, mean age = 11.8 years) performed 90 minutes of supervised plyometric and resistance training twice weekly for 16 weeks. A group of control subjects (n = 9, age = 12.1 years) maintained their current activity levels...
October 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28930932/complex-training-the-effect-of-exercise-selection-and-training-status-on-postactivation-potentiation-in-rugby-league-players
#18
David J Scott, Massimiliano Ditroilo, Phil A Marshall
This study compared the postactivation potentiation (PAP) response of the hex bar deadlift (HBD) and back squat (BS) exercises. The PAP response between different levels of athletes was also compared. Ten professional and 10 amateur rugby league players performed 2 experimental sessions. Participants performed a countermovement jump (CMJ) before and 2, 4, 6, 8, 10, 12, 14, and 16 minutes after a conditioning activity (CA) that contained 1 set of 3 repetitions at 93% 1 repetition maximum of either HBD or BS...
October 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28930878/performance-of-future-elite-players-at-the-nfl-scouting-combine
#19
David P Hedlund
The purpose of this study is to examine players' physical and performance measures taken at the NFL Scouting Combine and compare these to their future performance in the NFL. From 2002-2016, three types of player data (N=5,506) were collected from secondary data sources. Results players earned on various NFL Scouting Combine drills and measurements (e.g., height, weight, 40-yard dash time, vertical jump, bench press repetitions, shuttle run time, and 3-cone drill time), the position players play on the field (e...
September 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28930872/improving-vertical-jump-profiles-through-prescribed-movement-plans
#20
John K Mayberry, Bryce Patterson, Phil Wagner
Developing practical, reliable, and valid methods for monitoring athlete wellness and injury risk is an important goal for trainers, athletes, and coaches. Previous studies have shown that the countermovement vertical jump test (CMJ) is both a reliable and valid metric for evaluating an athlete's condition. This study examines the effectiveness of prescribed workouts on improving quality of movement during CMJ. The dataset consists of 2425 pairs of CMJ scans for high school, college, and professional athletes training at a privately owned facility...
September 11, 2017: Journal of Strength and Conditioning Research
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