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https://www.readbyqxmd.com/read/29239989/a-systematic-review-of-the-association-between-physical-fitness-and-musculoskeletal-injury-risk-part-3-flexibility-power-speed-balance-and-agility
#1
Sarah J de la Motte, Peter Lisman, Timothy C Gribbin, Kaitlin Murphy, Patricia A Deuster
We performed a systematic review and evaluation of the existing scientific literature on the association between flexibility, power, speed, balance, and agility, and musculoskeletal injury (MSK-I) risk in military and civilian populations. MEDLINE, EBSCO, EMBASE, and the Defense Technical Information Center were searched for original studies published from 1970 through 2015 that examined associations between these physical fitness measures (flexibility, power, speed, balance, and agility) and MSK-I. Methodological quality and strength of the evidence were determined following criteria adapted from previously published systematic reviews...
December 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29182436/vertical-and-horizontal-jump-capacity-in-international-cerebral-palsy-football-players
#2
Raul Reina, Aitor Iturricastillo, Rafael Sabido, Maria Campayo-Piernas, Javier Yanci
PURPOSE: the aims of the present study were to evaluate the reliability and validity of vertical and horizontal jump tests in football players with cerebral palsy (FPCP), and to analyze the jump performance differences between current IFCPF functional classes (i.e. FT5-FT8). METHODS: One hundred and thirty-two international para-footballers (25.8 ± 6.7 years; 70.0 ± 9.1 kg; 175.7 ± 7.3 cm; 22.8 ± 2.8 kg·m-2; 10.7 ± 7.5 years training experience) participated in the study...
November 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29158620/evaluation-of-different-jumping-tests-in-defining-position-specific-and-performance-level-differences-in-high-level-basketball-players
#3
Miran Pehar, Damir Sekulic, Nedim Sisic, Miodrag Spasic, Ognjen Uljevic, Ante Krolo, Zoran Milanovic, Tine Sattler
The importance of jumping ability in basketball is well known, but there is an evident lack of studies that have examined different jumping testing protocols in basketball players at advanced levels. The aim of this study was to assess the applicability of different tests of jumping capacity in identifying differences between (i) playing position and (ii) competitive levels of professional players. Participants were 110 male professional basketball players (height: 194.92±8.09 cm; body mass: 89.33±10.91 kg; 21...
September 2017: Biology of Sport
https://www.readbyqxmd.com/read/29112051/a-comparison-of-the-effects-of-short-term-plyometric-and-resistance-training-on-lower-body-muscular-performance
#4
Malcolm T Whitehead, Timothy P Scheett, Michael R McGuigan, N Z Auckland, Angel V Martin
The purpose of this study was to compare effects of short-term plyometric and resistance training on lower body muscular performance. A convenience sample of thirty males aged 21.3 ± 1.8 years, height 177.3 ± 9.4 cm, mass 80.0 ± 2.6 kg, body fat 16.1 ± 1.2 % participated in this investigation. Participants were grouped and participated in progressive plyometric (PLT) or resistance training (SRT) twice per week for eight consecutive weeks or a control (CNT) group that did not participate in any training...
November 1, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29045314/repeated-sprint-ability-in-division-i-collegiate-male-soccer-players-positional-differences-and-relationships-with-performance-tests
#5
Robert G Lockie, Matthew R Moreno, Ashley J Orjalo, Alyssa A Stage, Tricia M Liu, Samantha A Birmingham-Babauta, Jillian M Hurley, Ibett A Torne, Megan D Beiley, Fabrice G Risso, DeShaun L Davis, Adrina Lazar, John J Stokes, Dominic V Giuliano
Repeated-sprint ability (RSA) in essential for soccer. Important considerations when assessing RSA is whether there are differences between positions (defenders, midfielders, forwards), and what physiological characteristics may contribute to RSA. This has not been assessed in collegiate male players. Eighteen Division I male field players from one school performed several performance tests. The RSA test involved 7 x 30-m sprints completed on 20-s cycles. Measurements included total time (TT), and performance decrement (percent change in time from the first to last sprint; PD)...
October 16, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29039261/one-year-follow-up-of-the-capo-kids-trial-are-physical-benefits-maintained
#6
Rossana C Nogueira, Benjamin K Weeks, Belinda Beck
PURPOSE: To determine the 12-month maintenance of a 9-month, thrice-weekly, 10-minute high-intensity exercise program, delivered in schools, on bone and other health-related performance variables in prepubertal children. METHODS: All participants (N = 311) of the CAPO kids trial (testing times T1-T2) were contacted to undergo retesting (T3) of all original measures-including weight, standing and sitting height, calcaneal broadband ultrasound attenuation (Achilles, GE), and stiffness index (Achilles, GE)-waist circumference, resting heart rate, blood pressure, vertical jump, and aerobic capacity...
October 17, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28902117/factors-influencing-spike-jump-height-in-female-college-volleyball-players
#7
Yusuke Ikeda, Yusuke Sasaki, Shingo Sorimachi, Rena Hamano
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 recorded during each performance. The results obtained showed that SPJ height correlated with vertical velocity at take-off, horizontal velocity at third step contact, and the deceleration of horizontal velocity from third step contact to take-off...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28900558/validity-of-athletic-task-performance-measures-collected-with-a-single-camera-motion-analysis-system-as-compared-to-standard-clinical-measurements
#8
April L McPherson, John D Berry, Nathanial A Bates, Timothy E Hewett
BACKGROUND: Previous investigations of single-camera 3D motion analysis camera systems validity have yielded mixed results for clinical applications. PURPOSE: The purpose of the current study was to determine the validity of a single-camera 3D motion analysis system for subject standing height, vertical jump height, and broad jump length. It was hypothesized that single-camera system values would demonstrate high correlation to the values obtained from accepted standard clinical measurements...
August 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28900557/inter-and-intra-rater-reliability-of-performance-measures-collected-with-a-single-camera-motion-analysis-system
#9
Nathanial A Bates, April L McPherson, John D Berry, Timothy E Hewett
BACKGROUND: Previous reliability investigations of single-camera three dimensional (3D) motion analysis systems have reported mixed results. PURPOSE: The purpose of the current study was to determine the intra- and inter-rater reliability of a single-camera 3D motion analysis system for subject standing height, vertical jump height, and broad jump length. STUDY DESIGN: Experimental in vivo reliability study. PARTICIPANTS: Twelve subjects (age 20...
August 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28872385/new-records-in-human-power
#10
Thomas Haugen, Gøran Paulsen, Stephen Seiler, Øyvind Sandbakk
Maximal aerobic and anaerobic power are crucial performance determinants in most sports disciplines. Numerous studies have published power data from elite athletes over the years, particularly in runners, cyclists, rowers and cross-country skiers. In this invited review, we define the current "world records" in human upper limits of aerobic and anaerobic power. Currently, V̇O2max values of ~7.5 and 7.0 L·min(-1) in male cross-country (XC) skiers and rowers, respectively, and/or ~90 ml·kg(-1)·min(-1) in XC skiers, cyclists and runners can be described as upper human limits for aerobic power...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28858051/long-term-changes-in-jump-performance-and-maximum-strength-in-a-cohort-of-ncaa-division-i-women-s-volleyball-athletes
#11
Ashley A Kavanaugh, Satoshi Mizuguchi, William A Sands, Michael W Ramsey, Michael H Stone
The purpose of this investigation was to quantify the magnitude of change in maximal strength and jumping abilities over approximately one, two, and three years of supervised sport and resistance training in NCAA Division I women's volleyball athletes. This was an exploratory study on a cohort of women's volleyball athletes (n=29) split into three groups based on length of time spent in a supervised resistance training program: group 1 (n=11): 0.7±0.3 yrs, group 2 (n=9): 1.6±0.2 yrs, and group 3 (n=9): 2...
August 26, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28838226/intradialytic-exercise-improves-physical-function-and-reduces-intradialytic-hypotension-and-depression-in-hemodialysis-patients
#12
So Yon Rhee, Jin Kyung Song, Suk Chul Hong, Jae Won Choi, Hee Jung Jeon, Dong Ho Shin, Eun Hee Ji, Eun-Hee Choi, Jiyeon Lee, Aram Kim, Seung Wook Choi, Jieun Oh
Background/Aims: As numbers of maintenance hemodialysis patients are growing, debilitating conditions of muscle wasting and atrophy are becoming some of the greatest concerns in end-stage renal disease patients. Exercise training has various potential benefits in terms of prevention of a sustained decline in functional status. This study aimed to evaluate the physical, psychological, laboratory, and dialysis-related effects of intradialytic exercise. Methods: We enrolled 22 patients from a hemodialysis center for a 6-month non-randomized prospective trial...
August 25, 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/28674601/physiological-characteristics-of-projected-starters-and-non-starters-in-the-field-positions-from-a-division-i-women-s-soccer-team
#13
Fabrice G Risso, Farzad Jalilvand, Ashley J Orjalo, Matthew R Moreno, Deshaun L Davis, Samantha A Birmingham-Babauta, John J Stokes, Alyssa A Stage, Tricia M Liu, Dominic V Giuliano, Adrina Lazar, Robert G Lockie
NCAA soccer features different substitution rules compared to FIFA-sanctioned matches, with a greater availability of players who can enter the game. This could influence the physiological characteristics of the field position starters (ST) and non-starters (NST) within a collegiate women's team, which has not been previously analyzed. Thus, 22 field players from the same Division I women's soccer squad completed: vertical and standing broad jumps; 30-meter (m) sprint (0-5, 0-10, 0-30 m intervals); pro-agility and 60-yard shuttle; and the Yo-Yo Intermittent Recovery Test Level 1...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28672065/lean-mass-explains-the-association-between-muscular-fitness-and-bone-outcomes-in-13-year-old-boys
#14
Esther Ubago-Guisado, Dimitris Vlachopoulos, Augusto César Ferreira de Moraes, Ana Torres-Costoso, Kelly Wilkinson, Brad Metcalf, Javier Sánchez-Sánchez, Leonor Gallardo, Luis Gracia-Marco
AIM: This study investigated the associations between fitness indices and bone outcomes in young males. METHODS: Data were collected between autumn and winter 2014-2015 on 121 males with a mean age of 13.1 ± 0.1 years: 41 swimmers, 37 footballers, 29 cyclists and 14 nonathletes. Participants were recruited from athletic clubs and schools across South West England. Lean mass, areal bone mineral density and hip structural estimates were measured using dual-energy X-ray absorptiometry...
July 3, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28658084/addition-of-glute-ham-gastroc-raise-to-a-resistance-training-program-effect-on-jump-propulsion-and-landing
#15
Loren Z F Chiu, Anita Yaremko, Gabriella L vonGaza
Chiu LZF, Yaremko A, and vonGaza GL. Addition of glute-ham-gastroc raise to a resistance training program: effect on jump propulsion and landing. J Strength Cond Res 31(9): 2562-2571, 2017-Exercises such as squats and cleans are commonly used in resistance training programs to enhance athletic performance. However, these exercises may not effectively train the gastrocnemius, an important muscle for energy generation and absorption. The purpose of this research was to examine the effects of adding glute-ham-gastroc raise exercise to target the gastrocnemius to a traditional resistance training program involving squats and cleans...
September 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28494261/relationship-between-physical-performance-and-self-reported-function-in-healthy-individuals-across-the-lifespan
#16
Jennifer N Baldwin, Marnee J McKay, Claire E Hiller, Niamh Moloney, Elizabeth J Nightingale, Joshua Burns
BACKGROUND: Functional outcome measures in clinical trials of musculoskeletal conditions need to be meaningful to individuals. OBJECTIVES: To investigate the relationship between physical performance and self/proxy-reported function in 1000 healthy children and adults. DESIGN: Cross-sectional observational study (1000 Norms Project). METHODS: One thousand males and females aged 3-101 years, healthy by self-report and without major physical disability, were recruited...
May 2, 2017: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/28330961/reference-values-for-developing-responsive-functional-outcome-measures-across-the-lifespan
#17
Marnee J McKay, Jennifer N Baldwin, Paulo Ferreira, Milena Simic, Natalie Vanicek, Joshua Burns
OBJECTIVE: To generate a reference dataset of commonly performed functional outcome measures in 1,000 children and adults and investigate the influence of demographic, anthropometric, strength, and flexibility characteristics. METHODS: Twelve functional outcome measures were collected from 1,000 healthy individuals aged 3-101 years: 6-minute walk test, 30-second chair stand test, timed stairs test, long jump, vertical jump, choice stepping reaction time, balance (Star Excursion Balance Test, tandem stance eyes open and closed, single-leg stance eyes closed), and dexterity (9-hole peg test, Functional Dexterity Test)...
April 18, 2017: Neurology
https://www.readbyqxmd.com/read/28182510/the-effect-of-plyometric-training-volume-in-prepubertal-male-soccer-players-athletic-performance
#18
Helmi Chaabene, Yassine Negra
PURPOSE: The aim of this study was to assess and to compare the effects of 8-weeks in-season (2 sessions per-week) low and high-volume plyometric training (PT) on measures of physical fitness in prepubertal male soccer players. METHODS: A total of twenty-five soccer players were randomly assigned to low-volume plyometric training group (LPT; n=13; age = 12.68 ± 0.23 years; age at peak height velocity (APHV) = 14.25 ± 0.29 years, maturity-offset = -1.57 ± 0.29 years) and high-volume plyometric training group (HPT; n=12; age = 12...
February 9, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27899276/a-comparison-of-the-physical-and-anthropometric-qualities-explanatory-of-talent-in-the-elite-junior-australian-football-development-pathway
#19
Carl T Woods, Ashley Cripps, Luke Hopper, Christopher Joyce
OBJECTIVES: To compare the physical and anthropometric qualities explanatory of talent at two developmental levels in junior Australian football (AF). DESIGN: Cross-sectional observational. METHODS: From a total of 134 juniors, two developmental levels were categorised; U16 (n=50; 15.6±0.3 y), U18 (n=84; 17.4±0.5 y). Within these levels, two groups were a priori defined; talent identified (U16; n=25; 15.7±0.2 y; U18 n=42; 17.5±0.4 y), non-talent identified (U16; n=25; 15...
November 23, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/27837043/reliability-of-sargent-jump-test-in-4-to-5-year-old-children
#20
Carlos AyánPérez, José M CancelaCarral, Joaquín Lago-Ballesteros, Iván Martínez-Lemos
We assessed the test-retest reliability of the Sargent jump (VJ) for vertical jumping performed by 4 and 5 years old pre-schoolers. The VJ was administered three times (familiarization, test, and retest) to 163 children (mean age: 4.48 ± 0.5 years; 55.8% girls). The results were compared with those obtained in the standing long jump (SLJ) and in the 25 -m dash test to identify how its performance correlated with other measures of leg power. Systematic change in the mean and retest correlations with these other measures were used to help analyze VJ test-retest reliability...
November 11, 2016: Perceptual and Motor Skills
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