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International Journal of Sports Medicine

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https://www.readbyqxmd.com/read/27832671/exercise-based-cardiac-rehabilitation-in-coronary-disease-training-impulse-or-modalities
#1
P-M Leprêtre, M Ghannem, M Bulvestre, S Ahmaidi, S Delanaud, T Weissland, P Lopes
To compare the effects of 2 short programs with similar training load (TL), based on combined aerobic - resistance training (CT) or aerobic training (AT) on cardiorespiratory responses, 32 patients with coronary heart disease (CHD: 63.8±8.0y, 1.73±0.06 m, 84.8±15.9 kg, Left Ventricular Ejection Fraction: 0.53±0.8) performed 4 weeks of exercise rehabilitation based on CT (n=16) or AT (n=16). Maximal tolerated power (MTP), peak values of oxygen uptake (VO2peak) and heart rate (HRpeak), anaerobic threshold (VT1) were determined during an incremental cycling exercise test before and after training periods...
November 10, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27813047/effects-of-acute-aerobic-exercise-on-arterial-stiffness-before-and-after-glucose-ingestion
#2
R Kobayashi, S Yoshida, T Okamoto
The purpose of present study was to compare the acute effects of moderate-intensity aerobic exercise (65% peak oxygen uptake, 30 min) on arterial stiffness before and after glucose ingestion. 11 healthy young males completed 4 trials in random order. They started aerobic exercise at 90 min before (-90 min-EX), 60 min before (-60 min-EX), 30 min after (30 min-EX), and 60 min after (60 min-EX) the 75-g oral glucose tolerance test (OGTT). Aortic (carotid-femoral) and leg (femoral-ankle) pulse wave velocity (PWV), brachial and ankle blood pressure (BP), blood glucose (BG) and insulin levels were measured at 90 min (baseline) and 30 min before and at 30, 60 and 120 min after the 75-g OGTT...
November 3, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27813046/the-association-between-mct1-t1470a-polymorphism-and-power-oriented-athletic-performance
#3
N Kikuchi, N Fuku, R Matsumoto, S Matsumoto, H Murakami, M Miyachi, K Nakazato
The purpose of this study was to investigate the effects of the MCT1 T1470A polymorphism (rs1049434) on power-oriented performance and lactate concentration during or after cycling sprints in Japanese wrestlers. Participants (199 wrestlers and 649 controls) were genotyped for the MCT1 T1470A genotype (rs1049434) using the TaqMan(®) Assay. All wrestlers were international (n=77) or national (n=122) level athletes. Among them, 46 wrestlers performed 2 anaerobic performance tests, a 30-s Wingate Anaerobic test (WAnT) and a series of 10 maximal effort 10-s sprints on a cycle ergometer...
November 3, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27793064/hypertrophy-type-resistance-training-improves-phase-angle-in-young-adult-men-and-women
#4
A S Ribeiro, A Avelar, L Dos Santos, A M Silva, L A Gobbo, B J Schoenfeld, L B Sardinha, E S Cyrino
The main purpose of the present study was to investigate the effect of a hypertrophy-type resistance training protocol on phase angle, an indicator of cellular integrity, in young adult men and women. 28 men (22.2±4.3 years, 67.8±9.0 kg and 174.2±6.8 cm) and 31 women (23.2±4.1 years, 58.7±12.1 kg and 162.7±6.4 cm) underwent a progressive RT for 16 weeks (2 phases, 8 weeks each), 3 times per week, consisting of 10 to 12 whole body exercises with 3 sets of 8-12 repetitions maximum. Phase angle, resistance, reactance and total body water (intra and extracellular water compartments) were assessed by bioimpedance spectroscopy (Xitron 4200 Bioimpedance Spectrum Analyzer)...
October 28, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27793063/electrostimulation-training-effects-on-diurnal-fluctuations-of-neuromuscular-performance
#5
H Gueldich, N Zarrouk, H Chtourou, F Zghal, S Sahli, H Rebai
This study examined the effects of electrostimulation (ES) strength training at the same time-of-day on the diurnal fluctuations of maximal voluntary isometric contractions (MVIC) and surface electromyography (EMG). 20 male performed 3 MVICs of knee extension coupled with surface EMG before and after 5 weeks of 3 ES training sessions per week. Each ES training session consisted in 45 isometric contractions. The participants were randomly assigned to either a morning (MTG, 07:00-08:00 h) or an evening (ETG, 17:00-18:00 h) training group...
October 28, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27793062/variation-in-responses-to-sprint-training-in-male-youth-athletes-a-meta-analysis
#6
J Moran, G Sandercock, M C Rumpf, D A Parry
The trainability of youths and the existence of periods of accelerated adaptation to training have become key subjects of debate in exercise science. The purpose of this meta-analysis was to characterise youth athletes' adaptability to sprint training across PRE-, MID-, and POST-peak height velocity (PHV) groups. Effect sizes were calculated as a measure of straight-line sprinting performance with studies qualifying based on the following criteria: (a) healthy male athletes who were engaged in organised sports; (b) groups of participants with a mean age between 10 and 18 years; (c) sprint training intervention duration between 4 and 16 weeks...
October 28, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27793061/cardiorespiratory-kinetics-determined-by-pseudo-random-binary-sequences-comparisons-between-walking-and-cycling
#7
J Koschate, U Drescher, L Thieschäfer, O Heine, K Baum, U Hoffmann
This study aims to compare cardiorespiratory kinetics as a response to a standardised work rate protocol with pseudo-random binary sequences between cycling and walking in young healthy subjects. Muscular and pulmonary oxygen uptake (V̇O2) kinetics as well as heart rate kinetics were expected to be similar for walking and cycling. Cardiac data and V̇O2 of 23 healthy young subjects were measured in response to pseudo-random binary sequences. Kinetics were assessed applying time series analysis. Higher maxima of cross-correlation functions between work rate and the respective parameter indicate faster kinetics responses...
October 28, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27793060/rhinitis-in-elite-and-non-elite-field-hockey-players
#8
A Walker, P Surda, M Rossiter, S Little
Rhinitis has been demonstrated to impose a significant disease burden upon the general population. We sought to determine the prevalence of rhinitis in athletes; to investigate its relationship with co-existing allergic symptoms; and to quantify the impact of rhinitis on quality of life in the athlete.3 subgroups were studied: elite field hockey players (FHP); non-elite FHP; and a sedentary control group.Participants were asked to complete a rhinitis self-report questionnaire; the "Allergic Questionnaire for Athletes" (AQUA), and quality of life Sinonasal Outcome Test - 22 (SNOT-22)...
October 28, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27780284/effect-of-continuous-and-intermittent-exercises-on-oxidised-hdl-and-ldl-lipids-in-runners
#9
I A Välimäki, T Vuorimaa, M Ahotupa, T Vasankari
We studied the effects of different types of exercises on the concentrations of oxidised HDL (oxHDLlipids) and LDL lipids (oxLDLlipids), serum lipids, antioxidant potential, paraoxonase and malondialdehyde in endurance runners by performing both a 40-min continuous run (velocity corresponding to 80% VO2max) and a 40-min intermittent run (2-min run, velocity corresponding to 100% VO2max, and 2-min rest) using a treadmill. Blood samples were taken before exercise, after 20 and 40 min of exercise, and 15 and 90 min after the end of exercise...
October 25, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27737489/health-promoting-effects-of-serial-vs-integrated-combined-strength-and-aerobic-training
#10
K Karatrantou, V Gerodimos, K Häkkinen, A Zafeiridis
Combined strength and aerobic training programs are widely used for improving markers of physical fitness and health. We compared the efficiency of a serial and an integrated combined training program on health and overall fitness in middle-aged females. 54 females (46.7±4.5yrs) were assigned to a serial (SCG) or an integrated (ICG) combined training group or to a control group (CG). The SCG and ICG performed a 3-month training combining aerobic dance and calisthenics. The 2 training programs differ in the sequence of aerobic and strength exercises...
October 13, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27737488/estimating-energy-expenditure-using-individualized-power-specific-gross-efficiencies
#11
E P Homestead, J E Peterman, L A Kane, E J Contini, W C Byrnes
Our purpose was to determine if using an individual's power-specific gross efficiency improves the accuracy of estimating energy expenditure from cycling power. 30 subjects performed a graded cycling test to develop 4 gross efficiencies: individual power-specific gross efficiencies, a group mean power-specific gross efficiency, individual fixed gross efficiencies, and a group mean fixed gross efficiency. Energy expenditure was estimated from power using these different gross efficiencies and compared to measured energy expenditure during moderate- and hard-intensity constant-power and 2 variable-power cycling bouts...
October 13, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27737487/effects-of-pericardiectomy-on-training-and-myocardial-infarction-induced-left-ventricular-hypertrophy-chamber-dimensions-and-gene-expression
#12
A M Wolff, T P Rasmussen, C R Wichern, M R Peterson, M M Stayton, D P Thomas
The primary purpose of the study was to evaluate whether a pericardiectomy (PERI) alters training- or myocardial infarction (MI)-induced left ventricular hypertrophy (LVH), chamber geometry, gene expression and/or running performance. Mice were randomized into 6 groups: naïve control (CONT)-sedentary (Sed), CONT-trained (Tr), PERI-Sed, PERI-Tr, MI-Sed and MI-Tr. MI mice also received a pericardiectomy as part of the MI surgical procedure. 10 weeks of treadmill running resulted in enhanced running performance-to-exhaustion in all 3 trained groups (CONT-Tr, PERI-Tr, MI-Tr) compared to sedentary cohorts (P<0...
October 13, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27737486/do-environmental-conditions-contribute-to-narcosis-onset-and-symptom-severity
#13
P Lafère, C Balestra, W Hemelryck, F Guerrero, P Germonpré
Although many factors contributing to inert gas narcosis onset and severity have been put forward, the available evidence is not particularly strong. Using objective criteria, we have assessed brain impairment associated with narcosis under various environmental diving conditions. 40 volunteers performed a no-decompression dive (33 m for 20 min) either in a dry chamber, a pool or open sea. They were assessed by critical flicker fusion frequency before the dive, upon arriving at depth, 5 min before ascent, on surfacing and 30 min post-dive...
October 13, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27737485/dynamic-stretching-does-not-change-the-stiffness-of-the-muscle-tendon-unit
#14
T Mizuno, Y Umemura
No abstract text is available yet for this article.
October 13, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27737484/usefulness-of-video-review-of-possible-concussions-in-national-youth-rugby-league
#15
A J Gardner, R M N Kohler, C R Levi, G L Iverson
A new concussion interchange rule (CIR) was introduced in 2014 for the National Rugby League and National Youth Competition (NYC). The CIR allows a player suspected of having sustained a concussion to be removed from play and assessed without an interchange being tallied against the player's team. Participants included all NYC players who used the CIR during the 2014 season. 2 raters completed video analysis of 131 (of a total of 156 reported) uses of the CIR, describing injury characteristics, situational factors, and concussion signs...
October 13, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27716865/breaking-up-prolonged-sitting-does-not-alter-postprandial-glycemia-in-young-normal-weight-men-and-women
#16
R K Hansen, J B Andersen, A S Vinther, U Pielmeier, R G Larsen
A randomized, controlled, cross-over study was used to investigate the effects of breaking up prolonged sitting with low intensity physical activity on postprandial blood glucose concentrations in healthy, young, normal-weight adults. 14 men (n=6) and women (n=8) were assigned to 2.5 h of prolonged sitting (CON) and 2.5 h of prolonged sitting with 2-min bouts of walking every 20 min (LIPA). After ingesting a standardized test drink, capillary blood was sampled every 10 min to establish a postprandial blood glucose profile...
October 7, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27716864/exogenous-carbohydrate-reduces-cortisol-response-from-combined-mental-and-physical-stress
#17
M J McAllister, H E Webb, D K Tidwell, J W Smith, B J Fountain, M W Schilling, R D Williams
Combined mental and physical stress is associated with exacerbated cortisol production which may increase risk for the progression of cardiovascular disease in individuals working in high-stress occupations (e.g., firefighters, military personnel, etc.). Carbohydrate (CHO) ingestion prior to physical stress may attenuate cortisol concentrations. This project was the first to investigate the effect of CHO ingestion on cortisol response from combined mental and physical stress. 16 men 21-30 years old were randomly assigned a 6...
October 7, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27706551/traditional-periodization-versus-optimum-training-load-applied-to-soccer-players-effects-on-neuromuscular-abilities
#18
I Loturco, F Y Nakamura, R Kobal, S Gil, B Pivetti, L A Pereira, H Roschel
It is unknown whether traditional periodization of strength-power training involving accumulation, transformation and realization blocks is superior to other simpler and more practical training schemes. The purpose of this study was thus to investigate changes in strength/power/speed characteristics of elite soccer players in response to either classic strength-power periodization (TSP) or optimum power load (OPL). 23 professional soccer players were randomly assigned to TSP or OPL for 6 weeks in-season regular training (3 times per week)...
October 5, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27706550/precooling-does-not-enhance-the-effect-on-performance-of-midcooling-with-ice-slush-menthol
#19
F Riera, T T Trong, K Rinaldi, O Hue
This study investigated whether the combination of internal precooling (PC) and internal midcooling (MC cooling during exercise) would enhance performance more than MC alone. 9 trained males completed two 30-km cycling trials in a hot and humid environment (WBGT: 29±0.7°C, 80±0.02% relative humidity). For 30 min before exercise, the subjects sat quietly and drank water at 23°C (MC) or 3°C (PC+MC). During the MC and PC+MC time trials, they drank an ice-slush/menthol beverage (i. e., 0.025% menthol)...
October 5, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27706549/a-multivariate-assessment-of-clinical-contributions-to-the-severity-of-perceived-dysfunction-measured-by-the-cumberland-ankle-instability-tool
#20
A Rosen, J Ko, C Brown
Chronic ankle instability is a common pathological consequence of ankle sprains. However, screening tools which assess self-reported dysfunction offer little insight into clinical factors which may be useful to improve deficits. The purpose of this study was to identify factors that contribute most to self-reported dysfunction. 93 individuals completed the Cumberland Ankle Instability Tool (CAIT), active range of motion, dynamic postural stability assessments, and an arthrometer inversion stress test to assess lateral ankle laxity and stiffness...
October 5, 2016: International Journal of Sports Medicine
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