Warm-up durations in a hot-dry climate affect thermoregulation, mean power-output and fatigue, but not peak power in spe
- PDF / 830,624 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 5 Downloads / 140 Views
(2020) 12:76
RESEARCH ARTICLE
Open Access
Warm-up durations in a hot-dry climate affect thermoregulation, mean poweroutput and fatigue, but not peak power in specific soccer repeated-sprint ability Mohamed Frikha1,2* , Nesrine Chaâri2, Noureddine Ben Said3 and Mohammed Shaab Alibrahim1
Abstract Background: This study addressed the lack of data on the effect of warm-up (WU) duration in hot-dry climate (~ 30 °C; ~ 18% RH), on thermoregulation, muscular power-output, and fatigue after specific soccer repeated-sprint test (RSA). Methods: Eleven amateur soccer players participated in a cross-over randomized study and they underwent the Bangsbo repeated-sprint test, after three WU durations (i.e. WU10, WU15 and WU20 min) at 70% of MAV, and on different days. Peak power (PP), mean power (MP) and the fatigue index (FI) were recorded and analyzed. Likewise, heart rate (HR), tympanic temperature (Ttym), mean body temperature (MBT) and rating of perceived exertion (RPE) were recorded during each session. Results: The repeated measure ANOVA showed that MP improved after WU15 in comparison to WU10 and WU20 (p = 0.04 and p = 0.001; respectively). Nonetheless, no significant effect on PP was recorded after all WU durations. FI during RSA increased after WU20 in comparison to WU15 and WU10 (p < 0.001 and p = 0.003; respectively). Higher RPE values (p < 0.001) were recorded after WU15 and WU20 in comparison to WU10 duration. The two-way ANOVA showed higher ΔTtym and ΔMBT values after WU15 and WU20 compared to WU10 (p = 0.039 and p < 0.001for Ttym; p = 0.005 and p < 0.001 for MBT, respectively). Conclusions: The WU15 at 70% of MAV better assists mean power-output during soccer RSA in hot-dry (~ 30 °C; 18% RH) climate, but not peak power. Reducing WU duration up to 10 min seems to be insufficient to induce beneficial physiological changes necessary for optimizing repeated-sprint performance, while its extension up to 20 min remains detrimental for muscular power and induces higher fatigue. Keywords: Active warm-up, Heat stress, High-intensity effort, Performance, Speed decrement, Football
* Correspondence: [email protected] Mohamed Frikha and Nesrine Chaâri the first two authors are co-first authors. 1 Department of Physical Education, College of Education, King Faisal University, Al-Ahsa, Saudi Arabia 2 Research Laboratory: Education, Motricité, Sport & Santé, UR15JS01, High Institute of Sport and Physical Education, Sfax University, Sfax, Tunisia Full list of author information is available at the end of the article
© The Author(s). 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherw
Data Loading...
