Fluid balance during walking football games in summer

- A survey on sweating, hydration and types of beverages

Abstract

We conducted a study on the amount of sweating and fluid intake during walking football （WF） games in summer. The subjects of the survey were 82 people （64 men and 18 women） aged between 47 and 76. The survey was conducted over four days. The average WBGT over the four days was between 24.7 and 28.8 ℃ . The amount of sweat rate ranged from 367 to 495 g/h. The amount of sweat tended to increase on days when the WBGT was high. The rate of hydration relative to the amount of sweat was 64-79%. However, a negative correlation was observed between the hydration rate and age. The hydration rate was highest in the group where the proportion of sports drinks to total fluid intake was 50 % or more. Based on these results, it is necessary to promote heatstroke prevention measures during WF training.