Novo número da International Journal of Sports Physiology and Performance

IJSPP Volume 6, Issue 2, June

Editorial

Improving the Peer Review Process

145 – 146

David B. Pyne

Brief Review

Does the Time Frame Between Exercise Influence the Effectiveness of Hydrotherapy for Recovery?

147 – 159

Shona L. Halson

An increase in research investigating recovery strategies has occurred alongside the increase in usage of recovery by elite athletes. Because there is inconsistent evidence regarding the benefits of recovery on performance, it is necessary to examine research design to identify possible strategies that enhance performance in different athlete settings. The purpose of this review is to examine available recovery literature specifically related to the time frame between performance assessments to identify considerations for both research design and practical use of recovery techniques.

Original Investigations

The Effects of Wearing Undersized Lower-Body Compression Garments on Endurance Running Performance

160 – 173

Ben J. DascombeTrent K. HoareJoshua A. SearPeter R.J. ReaburnAaron T. Scanlan

Purpose: To examine whether wearing various size lower-body compression garments improves physiological and performance parameters related to endurance running in well-trained athletes. Methods: Eleven well-trained middle-distance runners and triathletes (age: 28.4 ± 10.0 y; height: 177.3 ± 4.7 cm; body mass: 72.6 ± 8.0 kg; VO2max: 59.0 ± 6.7 mL·kg–1·min–1) completed repeat progressive maximal tests (PMT) and time-to-exhaustion (TTE) tests at 90% VO2max wearing either manufacturer-recommended LBCG (rLBCG), undersized LBCG (uLBCG), or loose running shorts (CONT). During all exercise testing, several systemic and peripheral physiological measures were taken. Results: The results indicated similar effects of wearing rLBCG and uLBCG compared with the control. Across the PMT, wearing either LBCG resulted in significantly (P < .05) increased oxygen consumption, O2 pulse, and deoxyhemoglobin (HHb) and decreased running economy, oxyhemoglobin, and tissue oxygenation index (TOI) at low-intensity speeds (8–10 km·h–1). At higher speeds (12–18 km·h−1), wearing LBCG increased regional blood flow (nTHI) and HHb values, but significantly lowered heart rate and TOI. During the TTE, wearing either LBCG significantly (P < .05) increased HHb concentration, whereas wearing uLBCG also significantly (P < .05) increased nTHI. No improvement in endurance running performance was observed in either compression condition. Conclusion: The results suggest that wearing LBCG facilitated a small number of cardiorespiratory and peripheral physiological benefits that appeared mostly related to improvements in venous flow. However, these improvements appear trivial to athletes, as they did not correspond to any improvement in endurance running performance.

Reduction in Physical Match Performance at the Start of the Second Half in Elite Soccer

174 – 182

Matthew WestonAlan M. BatterhamCarlo CastagnaMatthew D. Portas,Christopher A. BarnesJamie A. HarleyRic J. Lovell

Relationships Between Triathlon Performance and Pacing Strategy During the Run in an International Competition

183 – 194

Yann Le MeurThierry BernardSylvain DorelChris R. AbbissGérard HonnoratJeanick BrisswalterChristophe Hausswirth

Do Male 100-km Ultra-Marathoners Overdrink?

195 – 207

Beat KnechtlePatrizia KnechtleThomas Rosemann

Influence of Environmental Temperature on 40 km Cycling Time-Trial Performance

208 – 220

Jeremiah J. PeifferChris R. Abbiss

The Effects of Fatigue on Soccer Skills Performed During a Soccer Match Simulation

221 – 233

Mark RussellDavid BentonMichael I.C. Kingsley

Table Tennis: Cardiorespiratory and Metabolic Analysis of Match and Exercise in Elite Junior National Players

234 – 242

Billy SperlichKarsten KoehlerHans-Christer HolmbergChristoph Zinner,Joachim Mester

Influence of Temperature and Performance Level on Pacing a 161 km Trail Ultramarathon

243 – 251

Carol A. PariseMartin D. Hoffman

The Construct Validity of Session RPE During an Intensive Camp in Young Male Taekwondo Athletes

252 – 263

Monoem HaddadAnis ChaouachiCarlo CastagnaDel P. WongDavid G. BehmKarim Chamari

 Purpose: The session rating of perceived exertion (RPE) is a practical and noninvasive method that allows a quantification of the internal training load (TL) in individual and team sports, but no study has investigated its construct validity in martial arts. Therefore, the purpose of this study was to examine the convergent validity between the session-RPE method and two objective HR-based methods for quantifying the similar TL during a high-TL camp in young Taekwondo (TKD) athletes. Methods: Ten young TKD athletes (mean ± SD: age, 13.1 ± 2.4 y; body mass, 46.1 ± 12.7 kg; height, 1.53 ± 0.15 m; maximum heart rate (HRmax), 201.0 ± 8.2 bpm) participated in this study. During the training period, subjects performed 35 TKD training sessions, including two formal competitions during which RPE and HR were recorded and analyzed (308 individual training sessions). Correlation analysis was used to evaluate the convergent validity between session-RPE method and the two commonly used HR-based methods for assessing TL in a variety of training modes. Results: Significant relationships were found between individual session-RPE and all the HR-based TLs (r values from 0.55 to 0.90; P < .001). Significant correlations were observed in all mode of exercises practiced in TKD. Conclusions: This study shows that session-RPE can be considered as a valid method to assess TL in TKD.

Seasonal Monitoring of Sprint and Jump Performance in a Soccer Youth Academy

264 – 275

Craig A. WilliamsJonathan L. OliverJames Faulkner

Purpose: The aim of the study was to longitudinally assess speed and jump performance characteristics of youth football players over a 3 y period. Methods:Two hundred players across five age squads (U12–U16) from an English Football League academy participated. Sprint performance (10 and 30 m) and countermovement jump height were assessed at 6 mo intervals. Pairwise analyses determined the level of change in performance between consecutive intervals.Results: Sprint performance changes tended to be greatest during the early teenage years, with observed changes exceeding the smallest worthwhile effect (1.0% for 10 and 30 m sprints). Changes in jump performance were above the smallest worthwhile effect of 1.8% for all but one interval. Large individual variability in the magnitude of change in sprint and jump performance, perhaps due to the confounding effect of growth and maturation, revealed few significant differences across the 6 mo intervals. Cumulative changes in performance demonstrated strong linear relationships, with a yearly rate of change of 6.9% for jump height, and 3.1 and 2.7% for 10 m and 30 m sprint time respectively. The magnitude of change in performance tended not to differ from one interval to another. Conclusions: The results of this study may primarily be used to monitor and predict the rate of progression of youth football players. In addition, these results may be used as a benchmark to evaluate the effectiveness of a current training program.

Invited Commentary

Using Modeling to Understand How Athletes in Different Disciplines Solve the Same Problem: Swimming Versus Running Versus Speed Skating

276 – 280

Jos J. de KoningCarl FosterAlejandro LucíaMaarten F. Bobbert,Florentina J. HettingaJohn P. Porcari

Case Study

Changes in a Top-Level Soccer Referee’s Training, Match Activities, and Physiology Over an 8-Year Period: A Case Study

281 – 286

Matthew WestonWarren GregsonCarlo CastagnaSimon BreivikFranco M. ImpellizzeriRic J. Lovell

Anúncios

Deixe um comentário

Preencha os seus dados abaixo ou clique em um ícone para log in:

Logotipo do WordPress.com

Você está comentando utilizando sua conta WordPress.com. Sair / Alterar )

Imagem do Twitter

Você está comentando utilizando sua conta Twitter. Sair / Alterar )

Foto do Facebook

Você está comentando utilizando sua conta Facebook. Sair / Alterar )

Foto do Google+

Você está comentando utilizando sua conta Google+. Sair / Alterar )

Conectando a %s