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https://www.readbyqxmd.com/read/29909738/relationships-between-hoffman-reflex-parameters-trait-stress-and-athletic-performance
#1
Rasool Bagheri, Mohammad Reza Pourahmadi, Rozita Hedayati, Ziaeddin Safavi-Farokhi, Atefeh Aminian-Far, Sadegh Tavakoli, Jafar Bagheri
This study evaluated the relationships between trait stress, Hoffman reflex, and performance among 36 healthy amateur male athletes. We first obtained a trait stress questionnaire from participants and then assigned them to high- and low-stress groups. We next recorded Hoffman reflex data from the soleus and lateral gastrocnemius muscles and then examined their athletic performance on testing protocols separated by a 72-hour washout period. Performance testing utilized vertical jump height, 20 -m sprint time, and standing stork tests...
January 1, 2018: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/29740558/the-contribution-analysis-of-knee-compression-bandage-and-arm-swing-control-on-maximum-horizontal-distance-in-standing-long-jump
#2
Che-Cheong Ryew, Seung-Hyun Hyun
The aim of the study was to analyze the effect of knee compression bandage and arm swing control on the maximum horizontal distance and ground reaction force variables in standing long jump. Adult male (n=8; mean age, 22.75±1.98 years; mean heights, 1.77±0.03 m; mean weights, 71.82±12.87 kg) participated in the experiment. The results obtained from variables of ground reaction force (GRF) in medial lateral, anterior posterior (AP), vertical (V) direction, resultant GRF (RGRF), decay rate (%), and maximum horizontal distance (MHD) were as follows; MHD, AP GRF, VGRF, RGRF (AP-V), and ratio of load reduction (%) showed more effective result under both wearing of knee compression bandage and arm swing...
April 2018: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29702517/assessing-repeated-sprint-ability-in-division-i-collegiate-women-soccer-players
#3
Robert G Lockie, Tricia M Liu, Alyssa A Stage, Adrina Lazar, Dominic V Giuliano, Jillian M Hurley, Ibett A Torne, Megan D Beiley, Samantha A Birmingham-Babauta, John J Stokes, Fabrice G Risso, DeShaun L Davis, Matthew R Moreno, Ashley J Orjalo
Lockie, RG, Liu, TM, Stage, AA, Lazar, A, Giuliano, DV, Hurley, JM, Torne, IA, Beiley, MD, Birmingham-Babauta, SA, Stokes, JJ, Risso, FG, Davis, DL, Moreno, MR, and Orjalo, AJ. Assessing repeated-sprint ability in Division I collegiate women soccer players. J Strength Cond Res XX(X): 000-000, 2018-Repeated-sprint ability (RSA) is a key component of soccer, and is the capacity to repeatedly produce near-maximal to maximal sprints with short recovery periods. Repeated-sprint ability has received little analysis in collegiate women soccer players...
April 26, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29692955/the-reliability-of-vertical-jump-tests-between-the-vertec-and-my-jump-phone-application
#4
Vanessa R Yingling, Dimitri A Castro, Justin T Duong, Fiorella J Malpartida, Justin R Usher, Jenny O
Background: The vertical jump is used to estimate sports performance capabilities and physical fitness in children, elderly, non-athletic and injured individuals. Different jump techniques and measurement tools are available to assess vertical jump height and peak power; however, their use is limited by access to laboratory settings, excessive cost and/or time constraints thus making these tools oftentimes unsuitable for field assessment. A popular field test uses the Vertec and the Sargent vertical jump with countermovement; however, new low cost, easy to use tools are becoming available, including the My Jump iOS mobile application (app)...
2018: PeerJ
https://www.readbyqxmd.com/read/29677099/optimal-adherence-to-a-mediterranean-diet-and-high-muscular-fitness-are-associated-with-a-healthier-cardiometabolic-profile-in-collegiate-students
#5
Robinson Ramírez-Vélez, Jorge Enrique Correa-Bautista, Mónica Liliana Ojeda-Pardo, Carolina Sandoval-Cuellar, Antonio García-Hermoso, Hugo Alejandro Carrillo, Katherine González-Ruíz, Daniel Humberto Prieto-Benavides, Alejandra Tordecilla-Sanders, Arvydas Martinkėnas, César Agostinis-Sobrinho
The aim of the study was to investigate the combined association of adherence to a Mediterranean diet (MedDiet) and muscular fitness (MF) with cardiometabolic health in collegiate students. The present cross-sectional analysis consisted of 1248 (714 females) healthy collegiate students (20.1 ± 2.7 years old). Adherence to a MedDiet was assessed by a KIDMED (Mediterranean Diet Quality Index) questionnaire. Standing broad jump, standing vertical jump, and isometric handgrip dynamometry were used as indicators of MF...
April 20, 2018: Nutrients
https://www.readbyqxmd.com/read/29628803/lower-body-strength-training-versus-proprioceptive-exercises-on-vertical-jump-capacity-a-feasibility-study
#6
Charles Son, Adam Stewart, John Ward, Kimary Farrar
Objective: The purpose of this study was to test the feasibility of completing a study comparing the impact of lower body strength training to proprioceptive exercises on vertical jump capacity. Methods: Thirty-nine college students (age 27.9 ± 6.4 y, height 1.69 ± 0.10 m, body mass 73.4 ± 15.9 kg: mean ± standard deviation) underwent baseline and post-testing of their vertical jump capacity using a Vertical Challenger and VICON motion analysis system. Participants were randomly assigned to 3 interventional groups between testing sessions: (1) lower body strength training, (2) lower body proprioceptive training, and (3) a no training control...
March 2018: Journal of Chiropractic Medicine
https://www.readbyqxmd.com/read/29611771/the-effects-of-maturation-on-jumping-ability-and-sprint-adaptations-to-plyometric-training-in-youth-soccer-players
#7
Abbas Asadi, Rodrigo Ramirez-Campillo, Hamid Arazi, Eduardo Sáez de Villarreal
The aim of this study was to investigate the effects of maturation on power and sprint performance adaptations following 6 weeks of plyometric training in youth soccer players during pre-season. Sixty male soccer players were categorized into 3 maturity groups (Pre, Mid and Post peak height velocity [PHV]) and then randomly assigned to plyometric group and control group. Vertical jump, standing long jump, and 20-m sprint (with and without ball) tests were collected before- and after-intervention. After the intervention, the Pre, Mid and Post-PHV groups showed significant (P ≤ 0...
April 3, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29533358/kinetic-analysis-of-horizontal-plyometric-exercise-intensity
#8
Andrew J Kossow, William P Ebben
Kossow, AJ, DeChiara, TG, Neahous, SM, and Ebben, WP. Kinetic analysis of horizontal plyometric exercise intensity. J Strength Cond Res 32(5): 1222-1229, 2018-Plyometric exercises are frequently performed as part of a strength and conditioning program. Most studies assessed the kinetics of plyometric exercises primarily performed in the vertical plane. The purpose of this study was to evaluate the multiplanar kinetic characteristics of a variety of plyometric exercises, which have a significant horizontal component...
May 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29506419/lowering-minimum-eye-height-to-increase-peak-knee-and-hip-flexion-during-landing
#9
Boyi Dai, Taylour J Hinshaw, Tyler A Trumble, Chaoyi Wang, Xiaopeng Ning, Qin Zhu
The purpose was to determine the effect of lowering minimum eye height through an externally focused object on knee and hip flexion and impact forces during jump-landing. Kinematics and ground reaction forces were collected when 20 male and 19 female participants performed jump-landing trials with their natural minimum eye height, and trials focusing on lowering their minimum eye height to an external object, which was set at 5% or 10% of standing height lower. Participants demonstrated decreased minimum eye height and increased peak knee and hip flexion during early-landing and stance phase when focusing on lowering eye height to the external object (p < 0...
March 5, 2018: Research in Sports Medicine
https://www.readbyqxmd.com/read/29339981/using-bilateral-functional-and-anthropometric-tests-to-define-symmetry-in-cross-country-skiers
#10
Glenn Björklund, Marie Alricsson, Ulla Svantesson
The aim of this study was to evaluate the symmetry of anthropometry and muscle function in cross-country skiers and their association to vertical jumping power. Twenty cross-country skiers were recruited (21.7 ± 3.8 yrs, 180.6 ± 7.6 cm, 73.2 ± 7.6 kg). Anthropometric data was obtained using an iDXA scan. VO2max was determined using the diagonal stride technique on a ski treadmill. Bilateral functional tests for the upper and lower body were the handgrip and standing heel-rise tests. Vertical jump height and power were assessed with a counter movement jump...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29324577/physical-fitness-performance-of-young-professional-soccer-players-does-not-change-during-several-training-seasons-in-a-spanish-elite-reserve-team-a-club-study-1996-2013
#11
Asier Los Arcos, Javier Martins
The purpose of the study was to assess the changes in physical fitness performance in young professional soccer players during several training seasons in a Spanish elite reserve team. Physical test values (i.e. vertical jump test, straight line sprint test, and discontinuous and progressive submaximal running test) of 97 young professional soccer players that belonged for at least two consecutive seasons to the reserve team of a Spanish professional team from 1996 to 2013 were analyzed. A distinction was made between the soccer players that were promoted to the Spanish 1/2 Divisions (n = 38) (PFL) and those that were not (n = 59) (non-PFL) (until the end of the 2016/2017 season)...
January 5, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29248809/the-identification-of-high-potential-archers-based-on-fitness-and-motor-ability-variables-a-support-vector-machine-approach
#12
Zahari Taha, Rabiu Muazu Musa, Anwar P P Abdul Majeed, Muhammad Muaz Alim, Mohamad Razali Abdullah
Support Vector Machine (SVM) has been shown to be an effective learning algorithm for classification and prediction. However, the application of SVM for prediction and classification in specific sport has rarely been used to quantify/discriminate low and high-performance athletes. The present study classified and predicted high and low-potential archers from a set of fitness and motor ability variables trained on different SVMs kernel algorithms. 50 youth archers with the mean age and standard deviation of 17...
February 2018: Human Movement Science
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
RANDOMIZED CONTROLLED TRIAL
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...
November 1, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28902117/factors-influencing-spike-jump-height-in-female-college-volleyball-players
#19
Yusuke Ikeda, Yusuke Sasaki, Rena Hamano
Ikeda, Y, Sasaki, Y, and Hamano, R. Factors influencing spike jump height in female college volleyball players. J Strength Cond Res 32(1): 267-273, 2018-The purpose of this study was to examine factors influencing spike jump (SPJ) performance by female competitive volleyball players through comparisons of the kinematic data of SPJ with those of the standing long jump (SLJ) and vertical jump (VJ). Seventeen female competitive volleyball players were asked to perform SPJ, SLJ, and VJ. Motion data of SPJ including the approach phase were recorded...
January 2018: 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
#20
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
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