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https://www.readbyqxmd.com/read/29786626/observation-of-women-soccer-players-physiology-during-a-single-season
#1
Kathleen M Paulsen, Cory L Butts, Brendon P McDermott
Paulsen, KM, Butts, CL, and McDermott, BP. Observation of women soccer players' physiology during a single season. J Strength Cond Res 32(6): 1702-1707, 2018-The purpose of this study was to observe heart rate (HR) responses in match settings over the course of a conference season in National Collegiate Athletic Association Division I women's soccer. Twenty-one female collegiate soccer players were provided a HR monitor and instructed to wear it for the duration of match play. Player positions included 6 defenders (DEF), 6 midfielders (MID), and 9 forwards (FWD)...
June 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29781937/body-composition-assessment-in-female-national-collegiate-athletic-association-division-i-softball-athletes-as-a-function-of-playing-position-across-a-multiyear-time-frame
#2
Ashley Peart, Danielle Wadsworth, Jessica Washington, Gretchen Oliver
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 XX(X): 000-000, 2018-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)...
May 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29768966/mood-effects-of-blood-flow-restriction-resistance-exercise-among-basketball-players
#3
Júlio C G Silva, Rodrigo R Aniceto, Leandro S Oliota-Ribeiro, Gabriel R Neto, Leonardo S Leandro, Maria S Cirilo-Sousa
This study compared the acute effects of resistance exercise with and without blood flow restriction (BFR) on basketball players' mood states. A total of 11 male basketball players (mean age = 19.9, SD = 2.8 years; mean height = 180.8, SD = 7.8 cm; mean weight = 71.1, SD = 9.1 kg; mean body mass index = 22.1, SD = 1.9 kg/m2 ) were randomly assigned to two experimental conditions: (a) low-load resistance exercise with BFR (LLRE + BFR) and high-load resistance exercise (HLRE) without BFR...
January 1, 2018: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/29753800/effect-of-sexual-intercourse-on-lower-extremity-muscle-force-in-strength-trained-men
#4
Leah M Valenti, Claudia Suchil, Gabriel Beltran, Roman C Rogers, Emily A Massey, Todd A Astorino
BACKGROUND: Sex has been deemed taboo for athletic performance going back to ancient Rome and Greece, as the act of sex was thought to promote ease and a sense of relaxation. AIM: This study examined the effect of sexual intercourse completed 12 hours before a bout of isokinetic dynamometry on muscle force production in strength-trained men. METHODS: 12 Healthy physically active men (age = 25.6 ± 3.8 years) who were sexually active participated in this study...
May 9, 2018: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/29746384/maximum-movement-workloads-and-high-intensity-workload-demands-by-position-in-ncaa-division-i-collegiate-football
#5
Gabriel J Sanders, Brad Roll, Corey A Peacock, Roger O Kollock
Sanders, GJ, Roll, B, Peacock, CA, and Kollock, RO. Maximum movement workloads and high-intensity workload demands by position in NCAA division I collegiate football. J Strength Cond Res XX(X): 000-000, 2018-The purpose of the study was to quantify the average and maximum (i.e., peak) movement workloads, and the percent of those workloads performed at high intensity by NCAA division I football athletes during competitive games. Using global positioning system devices (Catapult Sports), low, moderate, and high and total multidirectional movement workloads were quantified by each position...
May 2, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29742748/planning-training-workload-in-football-using-small-sided-games-density
#6
Sebastien Sangnier, Thierry Cotte, Olivier Brachet, Jeremy Coquart, Claire Tourny
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 XX(X): 000-000, 2018-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 collected from 25 professional soccer players (80...
May 8, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29697023/comparison-of-vibration-rolling-nonvibration-rolling-and-static-stretching-as-a-warm-up-exercise-on-flexibility-joint-proprioception-muscle-strength-and-balance-in-young-adults
#7
Chia-Lun Lee, I-Hua Chu, Bo-Jhang Lyu, Wen-Dien Chang, Nai-Jen Chang
Warm-up is an essential component for optimizing performance before an exercise session. This study investigated that the immediate effects of vibration rolling (VR), nonvibration rolling (NVR), and static stretching as a part of a warm-up regimen on the flexibility, knee joint proprioception, muscle strength, and dynamic balance of the lower extremity in young adults. Compared with the preintervention, VR induced the range of motion of knee flexion and extension significantly increased by 2.5% and 6%, respectively, and isokinetic peak torque and dynamic balance for muscle strength and dynamic balance increased by 33%-35% and 1...
April 26, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29695970/sport-specific-assessment-of-the-effectiveness-of-neuromuscular-training-in-young-athletes
#8
REVIEW
Erika Zemková, Dušan Hamar
Neuromuscular training in young athletes improves performance and decreases the risk of injuries during sports activities. These effects are primarily ascribed to the enhancement of muscle strength and power but also balance, speed and agility. However, most studies have failed to demonstrate significant improvement in these abilities. This is probably due to the fact that traditional tests do not reflect training methods (e.g., plyometric training vs. isometric or isokinetic strength testing, dynamic balance training vs...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29628898/postactivation-potentiation-of-the-plantar-flexors-does-not-directly-translate-to-jump-performance-in-female-elite-young-soccer-players
#9
Olaf Prieske, Nicola A Maffiuletti, Urs Granacher
High-intensity muscle actions have the potential to temporarily improve muscle contractile properties (i.e., postactivation potentiation, PAP) thereby inducing acute performance enhancements. There is evidence that balance training can improve performance during strength exercises. Taking these findings together, the purpose of this study was to examine the acute effects of a combined balance and strength (B+S) exercise vs. a strength only (S) exercise on twitch contractile properties, maximum voluntary strength, and jump performance in young athletes...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29614918/does-variability-within-natural-turfgrass-sports-fields-influence-ground-derived-injuries
#10
Chase M Straw, Christine O Samson, Gerald M Henry, Cathleen N Brown
Natural turfgrass sports fields exhibit within-field variations due to climatic conditions, field construction, field management, and foot traffic patterns from field usage. Variations within a field could influence the playing surface predictability and require athletes to make abrupt or frequent adjustments that lead to increased ground-derived injury occurrence. This study introduces a new methodology aimed at evaluating the potential relationship between within-field variations of turfgrass sports field properties and ground-derived athlete injuries...
April 3, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29599872/responsiveness-of-the-countermovement-jump-and-handgrip-strength-to-an-incremental-running-test-in-endurance-athletes-influence-of-sex
#11
Felipe García-Pinillos, Pedro Delgado-Floody, Cristian Martínez-Salazar, Pedro Á Latorre-Román
The present study analyzed the acute effects of an incremental running test on countermovement jump (CMJ) and handgrip strength performance in endurance athletes, considering the effect of post-exercise recovery time and sex. Thirty-three recreationally trained long-distance runners, 20 men and 13 women, participated voluntarily in this study. The participants performed the Léger test, moreover, the CMJ and handgrip strength tests were carried out before and after the running test and during different stages of recovery (at the 1st min of recovery (posttest1), 5th min of recovery (posttest2), and 10th min of recovery (posttest3))...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599871/effects-of-different-post-activation-potentiation-warm-ups-on-repeated-sprint-ability-in-soccer-players-from-different-competitive-levels
#12
Javier Sanchez-Sanchez, Alejandro Rodriguez, Cristina Petisco, Rodrigo Ramirez-Campillo, Cristian Martínez, Fábio Y Nakamura
This study aimed to compare the effects of a traditional warm-up with two post-activation potentiation (PAP) warm-up strategies on the repeated sprint ability (RSA) of soccer players from national (NL) and regional (RL) competitive levels. Sixteen young players (NL, n = 8, age = 20.7 ± 1.4 y, body mass = 68.5 ± 7.0 kg, body height = 177.4 ± 5.2 cm; RL, n = 8, age = 20.8 ± 1.0 y, body mass = 68.7 ± 4.0 kg, body height = 176.6 ± 5.6 cm) were recruited to complete a traditional warm-up (CONTROL), a PAP warm-up incorporating squats with a load (~60% 1RM) that allowed a high speed (1 m/s) of movement and a high number of repetitions (PAP-1), and a PAP warm-up with a load (~90% 1RM) that allowed a moderate speed (0...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29594958/change-of-direction-speed-toward-a-strength-training-approach-with-accentuated-eccentric-muscle-actions
#13
Helmi Chaabene, Olaf Prieske, Yassine Negra, Urs Granacher
There is growing evidence that eccentric strength training appears to have benefits over traditional strength training (i.e., strength training with combined concentric and eccentric muscle actions) from muscular, neuromuscular, tendinous, and metabolic perspectives. Eccentric muscle strength is particularly needed to decelerate and stabilize the body during the braking phase of a jump exercise or during rapid changes of direction (CoD) tasks. However, surprisingly little research has been conducted to elucidate the effects of eccentric strength training or strength training with accentuated eccentric muscle actions on CoD speed performance...
March 28, 2018: Sports Medicine
https://www.readbyqxmd.com/read/29566543/beetroot-based-gel-supplementation-improves-handgrip-strength-forearm-muscle-o2-saturation-but-not-exercise-tolerance-and-blood-volume-in-jiu-jitsu-athletes
#14
Gustavo Vieira de Oliveira, Luiz Nascimento, Mônica Volino-Souza, Jacilene Mesquita, Thiago Alvares
The ergogenic effect of beetroot on the exercise performance of trained cyclists, runners, kayakers, and swimmers has been demonstrated. However, whether or not beetroot supplementation presents a beneficial effect on the exercise performance of jiu-jitsu athletes (JJA) remains inconclusive. Therefore, present study assessed the effect of beetroot-based gel (BG) supplementation on maximal voluntary contraction (MVC), exercise time until fatigue (ETF), muscle O2 saturation (SmO2), blood volume (tHb), and plasma nitrate and lactate in response to handgrip isotonic exercise (HIE) in JJA...
March 22, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29548272/is-bony-hip-morphology-associated-with-range-of-motion-and-strength-in-asymptomatic-male-soccer-players
#15
Andrea B Mosler, Rintje Agricola, Kristian Thorborg, Adam Weir, Rod J Whiteley, Kay M Crossley, Per Hölmich
Study Design Cross-sectional cohort study. Objectives To investigate the relationship between musculoskeletal screening findings and bony hip morphology in asymptomatic male soccer players. Background Athletes with femoroacetabular impingement (FAI) syndrome have cam and/or pincer morphology, pain on orthopaedic testing, and often reduced hip range of motion (ROM) and strength. However, cam and pincer morphology is also common in asymptomatic hips. Therefore, it is currently unknown whether the ROM and strength deficits observed in athletes with FAI syndrome result from the variance in their bony hip morphology or from their hip condition...
April 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29544161/physical-self-concept-and-body-dissatisfaction-among-special-olympics-athletes-a-comparison-between-sex-weight-status-and-culture
#16
Cheng-Chen Pan, Christophe Maïano, Alexandre J S Morin
BACKGROUND: Little research has looked at the associations between sex, weight status and culture, and the physical self-perceptions and body dissatisfaction of individuals with intellectual disabilities (ID) involved in Special Olympics (SO) sports. AIMS: To examine sex- (male vs female), weight status- (non-overweight/obese vs. overweight/obese), and culture-based (North American vs. Asian) differences in physical self-concept and body dissatisfaction among SO athletes...
May 2018: Research in Developmental Disabilities
https://www.readbyqxmd.com/read/29528956/effects-of-heavy-squat-training-on-a-vibration-platform-on-maximal-strength-and-jump-performance-in-resistance-trained-men
#17
Roger L Hammer, Joshua T Linton, Adam M Hammer
The purpose of this investigation was to determine maximal strength and jump performance outcomes of heavy squat training on a low-amplitude (<1.0 mm peak-to-peak) vibration platform (VP). Nineteen recreationally resistance-trained college-aged men (22.3 ± 1.66 years) completed the 6-week study. Participants were randomly assigned to one of two training groups: SQT (n = 10) performed conventional back squats on the floor; SQTV (n = 9) performed back squats on the VP. Supervised training took place over 12 sessions (2 days/week) which utilized an aggressive strength development protocol (85-95 % 1-RM), which was identically followed by both groups...
March 6, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29489730/a-biomechanical-analysis-of-the-effects-of-bouncing-the-barbell-in-the-conventional-deadlift
#18
Kellen Krajewski, Robert LeFavi, Bryan Riemann
The purpose of this study is to analyze biomechanical differences between the bounce and pause styles of deadlifting. Twenty physically active males performed deadlifts at their 75% one repetition maximum testing utilizing both pause and bounce techniques in a within-subjects randomized study design. The average peak height the barbell attained from the three bounce style repetitions was used to compute a compatible phase for analysis of the pause style repetitions. Net joint moment impulse (NJMI), work, average vertical ground reaction force (vGRF), vGRF impulse and phase time were computed for two phases, lift off to peak barbell height and the entire ascent...
February 27, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29489728/normative-reference-values-for-high-school-aged-american-football-players
#19
Brianna D McKay, Amelia A Miramonti, Zachary M Gillen, Todd J Leutzinger, Alegra I Mendez, Nathaniel D M Jenkins, Joel T Cramer
The purpose of the present report was to provide test- and position-specific normative reference values for combine test results based on a large, nationally-representative sample of high school-aged American football players in their freshman, sophomore, and junior classes. Cross-sectional anthropometric and performance data were obtained from 12 different high school American football recruiting combines between March 7, 2015 and January 9, 2016 across the United States. Subjects included a sample (n=7,478) of high school-aged American football athletes in their junior (n=3,779), sophomore (n=2,514), and freshman (n=1,185) classes...
February 27, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29489715/force-velocity-relationship-in-three-different-variations-of-prone-row-exercises
#20
Irineu Loturco, Timothy Suchomel, Ronaldo Kobal, Ademir F S Arruda, Aristide Guerriero, Lucas A Pereira, Chi Nan Pai
This study examined the force-velocity relationship and tested the possibility of determining the relative loading intensity (% 1RM) in three different variations of prone row exercises. Thirty male top-level athletes from two different sports (National Team rugby union players and professional mixed martial arts fighters) were submitted to maximum dynamic strength assessments in the free prone bench pull, bent over barbell row, and bent over Smith-machine row, following standard procedures encompassing lifts performed from 40 to 100% of 1RM...
February 27, 2018: Journal of Strength and Conditioning Research
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