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Journal of Sports Science & Medicine

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https://www.readbyqxmd.com/read/28912664/modified-tuck-jump-assessment-reliability-and-training-of-raters
#1
Craig A Smith, Nicole J Chimera, Monica R Lininger, Meghan Warren
No abstract text is available yet for this article.
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912663/performance-enhancement-by-brain-stimulation
#2
Parisa Gazerani
No abstract text is available yet for this article.
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912662/long-term-changes-in-muscles-around-the-knee-joint-after-acl-resection-in-rats-comparisons-of-acl-resected-contralateral-and-normal-limb
#3
Mahiro Ohno, Hiroto Fujiya, Katsumasa Goto, Mitsutoshi Kurosaka, Yuji Ogura, Kanaka Yatabe, Takaaki Kudo, Hajime Kobayashi, Hisateru Niki, Haruki Musha
The purpose of this study was to investigate the long-term effects of anterior cruciate ligament (ACL) resection on the morphological and contractile characteristics of rectus femoris (RF) and semimembranosus (SM) muscles in both injured and contralateral hindlimbs in rats. Wistar male rats (8-week old) were used. Rats were divided into two groups; ACL-resected and (sham-operated) control groups. Furthermore, right and left limbs of rats in the ACL-resected group were assigned as ACL-resected and contralateral groups, respectively, at 1 day, 1, 4, and 48 weeks after ACL resection...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912661/effectiveness-of-movement-therapy-interventions-and-training-modifications-for-preventing-running-injuries-a-meta-analysis-of-randomized-controlled-trials
#4
Žiga Kozinc, Nejc Šarabon
Runners are at relatively high risk for sustaining an overuse injury. While many risk factors have been documented so far, previous reviews have mostly failed to identify effective interventions to lower injury risk in runners. To review the high-quality evidence on two types of preventive interventions - movement therapy interventions and training-modification interventions, regarding running-related injury prevention. Pubmed (MEDLINE), PEDro and Cochrane Central Register of Controlled Trials databases were searched in April 2017, with no date or language restrictions, using following search terms: running injury prevention, running injury therapy, running injury incidence, running injury exercise and running injury risk...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912660/effects-of-whole-body-vibration-on-the-neuromuscular-amplitude-of-vastus-lateralis-muscle
#5
Daniel T Borges, Liane B Macedo, Caio A A Lins, Catarina O Sousa, Jamilson S Brasileiro
The aim of this study was to investigate the effects of whole-body vibration (WBV) on vastus lateralis (VL) surface electromyographic (sEMG) amplitude during an isometric semi-squat exercise, using two different frequencies, and to verify the influence of additional filters on the analyzed sEMG signal's characteristics. Forty physically active women were randomly divided into two groups with 20 members each: one group performed an isometric semi-squat exercise at 30 Hz - while the other group performed the same exercise protocol at 50 Hz...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912659/power-time-curve-comparison-between-weightlifting-derivatives
#6
Timothy J Suchomel, Christopher J Sole
This study examined the power production differences between weightlifting derivatives through a comparison of power-time (P-t) curves. Thirteen resistance-trained males performed hang power clean (HPC), jump shrug (JS), and hang high pull (HHP) repetitions at relative loads of 30%, 45%, 65%, and 80% of their one repetition maximum (1RM) HPC. Relative peak power (PPRel), work (WRel), and P-t curves were compared. The JS produced greater PPRel than the HPC (p < 0.001, d = 2.53) and the HHP (p < 0.001, d = 2...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912658/a-systematic-method-to-detect-the-metabolic-threshold-from-gas-exchange-during-incremental-exercise
#7
Brett A Dolezal, Thomas W Storer, Eric V Neufeld, Stephanie Smooke, Chi-Hong Tseng, Christopher B Cooper
Incremental exercise consists of three domains of exercise intensity demarcated by two thresholds. The first of these thresholds, derived from gas exchange measurements, is defined as the metabolic threshold (V̇O2θ) above which lactate accumulates. Correctly and reliably identified, V̇O2θ is a non-invasive, sub-maximal marker of aerobic function with practical value. This investigation compared variability in selection of V̇O2θ among interpreters with different levels of experience as well as from auto-detection algorithms employed by a commercially available metabolic cart (MC)...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912657/moderate-intensity-cycling-exercise-after-upper-extremity-resistance-training-interferes-response-to-muscle-hypertrophy-but-not-strength-gains
#8
Shigeto Tomiya, Naoki Kikuchi, Koichi Nakazato
The purpose of the present study was to examine the effect of 30-min moderate intensity cycling exercise immediately after upper-body resistance training on the muscle hypertrophy and strength gain. Fourteen subjects were randomly divided between two groups. One group performed moderate intensity (55% of maximum oxygen consumption [VO2max], 30 min) cycle training immediately after arm resistance training as concurrent training (CT; n = 7, age: 21.8 ± 0.7 years, height: 1.68 ± 0.06 m, weight: 60.3 ± 7.4 kg); the second group performed the same endurance and arm RT on separate days as control group (SEP; n=7, age: 22...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912656/do-maximal-roller-skiing-speed-and-double-poling-performance-predict-youth-cross-country-skiing-performance
#9
Roland Stöggl, Erich Müller, Thomas Stöggl
The aims of the current study were to analyze whether specific roller skiing tests and cycle length are determinants of youth cross-country (XC) skiing performance, and to evaluate sex specific differences by applying non-invasive diagnostics. Forty-nine young XC skiers (33 boys; 13.8 ± 0.6 yrs and 16 girls; 13.4 ± 0.9 yrs) performed roller skiing tests consisting of both shorter (50 m) and longer durations (575 m). Test results were correlated with on snow XC skiing performance (PXC) based on 3 skating and 3 classical distance competitions (3 to 6 km)...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912655/chronic-eccentric-exercise-and-antioxidant-supplementation-effects-on-lipid-profile-and-insulin-sensitivity
#10
Christina Yfanti, Athanasios Tsiokanos, Ioannis G Fatouros, Anastasios A Theodorou, Chariklia K Deli, Yiannis Koutedakis, Athanasios Z Jamurtas
Eccentric exercise has been shown to exert beneficial effects in both lipid profile and insulin sensitivity. Antioxidant supplementation during chronic exercise is controversial as it may prevent the physiological training-induced adaptations. The aim of this study was to investigate: 1) the minimum duration of the eccentric exercise training required before changes on metabolic parameters are observed and 2) whether antioxidant supplementation during training would interfere with these adaptations. Sixteen young healthy men were randomized into the Vit group (1 g of vitamin C and 400 IU vitamin E daily) and the placebo (PL) group...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912654/reduced-spanish-version-of-participation-motives-questionnaire-for-exercise-and-sport-psychometric-properties-social-sport-differences
#11
María Del Pilar Vílchez, Cristina De Francisco
Understanding the motives that influence physical activity participation is important in order to orientate physical activity promotion and increase physical activity levels of practice of the population. Although many instruments been created and validated to measure motives to perform physical activity, one of the most frequently used scales during years is the Participation of Motives Questionnaire (PMQ) by Gill et al. (1983). Unfortunately, despite being so used and translated into many languages, there is no psychometric support for some factors about due to a low internal consistency...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912653/validity-of-a-newly-designed-rectilinear-stepping-ergometer-submaximal-exercise-test-to-assess-cardiorespiratory-fitness
#12
Rubin Zhang, Likui Zhan, Shaoming Sun, Wei Peng, Yining Sun
The maximum oxygen uptake (V̇O2 max), determined from graded maximal or submaximal exercise tests, is used to classify the cardiorespiratory fitness level of individuals. The purpose of this study was to examine the validity and reliability of the YMCA submaximal exercise test protocol performed on a newly-designed rectilinear stepping ergometer (RSE) that used up and down reciprocating vertical motion in place of conventional circular motion and giving precise measurement of workload, to determine V̇O2 max in young healthy male adults...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912652/objectively-measured-physical-activity-levels-among-ethnic-minority-children-attending-school-based-afterschool-programs-in-a-high-poverty-neighborhood
#13
Youngdeok Kim, Marc Lochbaum
Ethnic minority children living in high poverty neighborhoods are at high risk of having insufficient physical activity (PA) during school days and, thus, the importance of school as a place to facilitate PA in these underserved children has been largely emphasized. This study examined the levels and patterns of PA in minority children, with particular focus on the relative contributions of regular physical education (PE) and school-based afterschool PA program in promoting moderate- and vigorous-intensity PA (MVPA) during school days...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912651/manual-resistance-versus-conventional-resistance-training-impact-on-strength-and-muscular-endurance-in-recreationally-trained-men
#14
Iván Chulvi-Medrano, Tamara Rial, Juan M Cortell-Tormo, Yasser Alakhdar, Caue V La Scala Teixeira, Laura Masiá-Tortosa, Sandor Dorgo
Manual resistance training (MRT) has been widely used in the field of physical therapy. It has also been used as a strength training method due to the accommodating resistance nature of this modality. The aim of the present study was to compare the effects of an 8-week MRT program on maximum strength and muscular endurance in comparison to conventional resistance training in recreationally trained men. Twenty healthy recreationally trained male subjects were recruited and divided into a MRT training group and a conventional training (CT) group...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912650/the-effects-combining-cryocompression-therapy-following-an-acute-bout-of-resistance-exercise-on-performance-and-recovery
#15
William H DuPont, Brek J Meuris, Vincent H Hardesty, Emily C Barnhart, Landon H Tompkins, Morricia J P Golden, Clayton J Usher, Paul A Spence, Lydia K Caldwell, Emily M Post, Matthew K Beeler, William J Kraemer
Compression and cold therapy used separately have shown to reduce negative effects of tissue damage. The combining compression and cold therapy (cryocompression) as a single recovery modality has yet to be fully examined. To examine the effects of cryocompression on recovery following a bout of heavy resistance exercise, recreationally resistance trained men (n =16) were recruited, matched, and randomly assigned to either a cryocompression group (CRC) or control group (CON). Testing was performed before and then immediately after exercise, 60 minutes, 24 hours, and 48 hours after a heavy resistance exercise workout (barbell back squats for 4 sets of 6 reps at 80% 1RM, 90 sec rest between sets, stiff legged deadlifts for 4 sets of 8 reps at 1...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912649/does-live-high-train-low-and-high-hypoxic-training-alter-running-mechanics-in-elite-team-sport-players
#16
Olivier Girard, Grégoire P Millet, Jean-Benoit Morin, Franck Brocherie
This study aimed to investigate if "Live High-Train Low (and High)" hypoxic training alters constant-velocity running mechanics. While residing under normobaric hypoxia (≥14 h·d(-1); FiO2 14.5-14.2%) for 14 days, twenty field hockey players performed, in addition to their usual training in normoxia, six sessions (4 × 5 × 5-s maximal sprints; 25 s passive recovery; 5 min rest) under either normobaric hypoxia (FiO2 ~14.5%, n = 9) or normoxia (FiO2 20.9%, n = 11). Before and immediately after the intervention, their running pattern was assessed at 10 and 15 km·h(-1) as well as during six 30-s runs at ~20 km·h(-1) with 30-s passive recovery on an instrumented motorised treadmill...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912648/a-motivational-model-of-physical-education-and-links-to-enjoyment-knowledge-performance-total-physical-activity-and-body-mass-index
#17
Arto Gråstén, Anthony Watt
The present paper examined the full sequence of the Hierarchical Model of Motivation in physical education (PE) including motivational climate, basic psychological needs, intrinsic motivation, and related links to contextual enjoyment, knowledge, performance, and total moderate to vigorous physical activity (MVPA). Gender differences and correlations with body mass index (BMI) were also analyzed. Cross-sectional data was represented by self-reports and objective assessments of 770 middle school students (52% of girls) in North-East Finland...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912647/accelerometery-and-heart-rate-responses-of-professional-fast-medium-bowlers-in-one-day-and-multi-day-cricket
#18
James A Johnstone, Gerwyn Hughes, Andrew C Mitchell, Paul A Ford, Tim Watson, Rob Duffield, Dan Gordon, Justin D Roberts, Andrew T Garrett
The physical demands of fast-medium bowling are increasingly being recognised, yet comparative exploration of the differing demands between competitive formats (i.e. one-day [OD] versus multi-day [MD] matches) remain minimal. The aim of this study was to describe in-match physiological profiles of professional fast-medium bowlers from England across different versions of competitive matches using a multivariable wearable monitoring device. Seven professional cricket fast-medium bowlers wore the Bioharness(TM) monitoring device during matches, over three seasons (>80 hours in-match)...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912646/student-misbehavior-in-physical-education-the-role-of-2-%C3%A3-2-achievement-goals-and-moral-disengagement
#19
Wei-Ting Hsu, Hsiu-Hua Li, Yi-Hsiang Pan
This study aimed to determine whether goal orientations were related to students' self-reported misbehaviors in physical education and to examine whether the effects were mediated by moral disengagement. A two-study project employing structural equation modeling was conducted with high school students (Study 1, n = 287; Study 2, n = 296). In Study 1, the results showed that mastery-avoidance goals were unable to predict five misbehaviors (i.e., aggressive behavior, low engagement, failure to follow directions, poor self-management, and distracting behavior)...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28630584/time-loss-injuries-in-sub-elite-and-emerging-rugby-league-players
#20
Mark Booth, Rhonda Orr
This study aimed to 1) investigate the incidence and characteristics of injuries in emerging rugby league players; and 2) explore the differences in injury incidence and characteristics between the various sub-elite competitions. An NRL emerging player development squad (n = 34) was observed from the beginning of pre-season until the finish of competition. Time-loss injury was defined as any physical pain or impairment sustained that resulted in players missing a match. Injuries were categorised according to circumstance, incidence, characteristics, playing position and competition level...
June 2017: Journal of Sports Science & Medicine
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