Hyperthermia don't affect hydric status of acclimatized cyclists on the self-pace submaximal exercise

Authors

  • Reinato Silva 1 Euro American University Center, Brasil 2 Exercise Psychophysiology Group 3 Federal University of Juiz de Fora, 4 University of São Paulo, Brazil.
  • Bruno Ryker Exercise Psychophysiology Group
  • NF Sampaio Euro American University Center, Brasil Exercise Psychophysiology Group
  • CJ Brito Federal University of Juiz de Fora
  • B Viana Exercise Psychophysiology Group
  • FO Pires Exercise Psychophysiology Group Federal University of Juiz de Fora, University of São Paulo, Brazil.

Abstract

Introduction

Training acclimatization has been reported as a positive component focused on decrement of negative effects, caused by hyperthermia, on endurance exercise performance (Lorenzo et al., 1985, Journal Applied Physiology 109, 1140-1147/ Cheung, 2007, Applied Physiology, Nutrition, and Metabolism, 32, 808-817). However, few investigations have been made about hydric effects on this performance on submaximal exercise controlled by ratings of perceived exertion (RPE).

Purpose

To verify if a hyperthermia modifies the urinary density (UD), body mass (BM) and time to complete (TC) 20-km self-pace cycling (TT20km) with intensity fixed in 16 points of RPE.

 

 

Methods

With institutional ethics approval and after evaluation of healthy, ten experienced and acclimatized amateur cyclists (mean age: 32,9 ± 4,82 years; stature: 1,75 ± 0,7 meters) (mean ± s) performed one familiarization session, and two TT20km in control condition with 21 °C (CON) and experimental condition with 33 °C (EXP) in randomized order. The normality of the data was evaluated Shapiro-Wilk Test and in order to test our hypothesis, paired t-Test was carried out.

 

Results

the UD and BM were measured before and immediately after exercises. The results of DU did not differ between conditions (e.g. t., P = 0.307) although of an average reduction of 36.36% after exercise. For BM, it occurred the same (e.g. t., P = 0.295) despite the percentage difference of 1.23%. TC also not differ (e.g. t., P = 0.314) between conditions (CON = 2064.40 ± 117.99 sec; EXP = 2097.40 ± 86.04 sec).

 

Conclusions

The results suggest that hyperthermia don’t exerts negative influence over hydric status of acclimatized athletes, after ~ 30 min of submaximal 20-km self-pace cycling controlled by fixed perceived exertion

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Published

2018-01-25

How to Cite

Silva, R., Ryker, B., Sampaio, N., Brito, C., Viana, B., & Pires, F. (2018). Hyperthermia don’t affect hydric status of acclimatized cyclists on the self-pace submaximal exercise. Journal of Science and Cycling, 6(3). Retrieved from https://jsc-journal.com/index.php/JSC/article/view/365

Issue

Vol. 6 No. 3 (2017): Science & Cycling Congress, 28-29 June 2017, Düsseldorf, Germany

Section

Book of Abstracts

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