Effects of water deprivation on rectal and skin temperature and on performance in sustained muscular exercise in a hot climate

: This study was performed on 16 Senegal young soldiers well trained in physical activities. Experimentation was done in tropical zone in Kedougou (Oriental Senegal) during Scorching period if the year, diurnal-room temperature 34 degrees 9 average. The subject had to ride on a cyclo ergometer to a force corresponding to 75% maximum. The central cutaneous temperature, the provided force, and the cardiac frequence were measured at the end of the muscular's exercise. For each subject that effort's test was once in normal alimentation and the other one after 24 hours' hydric privation. We noticed a significant low of the provided power for having 75% of the maximal cardiac frequence, after half hours (30 mn) of exercise during the hydric restriction compared to normal alimentation. In other respects, a regular increase was observed of the rectal temperature in the course of the activity in any case. That rise was more important to subject in hydric restriction. On the other hand there wasn't any significant difference of the cutaneous temperatures in both situations. The hydric privation has caused a hypohydration in origin of the significant decrease of the performance even if they remain moderated.