The Study on the Prevention of Heat Disorders Using the Salty Taste Sensitivity During Exercise in the Heat Environment
【Supercategory：7. DESCENTE SPORTS SCIENCE Subcategory：7.37 Vol.37】
ABSTRACT
The purpose of this study was to investigate the availability of salty taste sensitivity during exercise for the prevention of heat disorders in the hot environment. Twelve health young males were volunteered in this study. This study was consisted of two investigations: the basic experiment (n=6) was to verify the changes of salty taste during stay at rest for 30 minutes or exercise stress for 30 minutes (exercise intensity: 50 % of predicted HRmax) in artificial weather room, and the other field investigation (n=6) was to estimate during basketball games for twice (each game: 10 minutes) under warm environment (Temperature: 26.5 ℃,Relative humidity: 72.2 %). The salty taste sensitivity, body weight, sweat loss, urinary electrolyte, the degree of salty appetite were measured before and after the game. Salty taste sensitivity and body weight after the exercise were significantly lower than that of before in 25 ℃, 35 ℃ and the field investigation (p<0.05). There were no large changes of Na and Cl in urine in the basic experiment. However, Na and Cl in urine after the game were significantly lower than that of before in the field investigation (p<0.05). It may be suggested that decrease of salty taste sensitivity and increase of salty appetite sensation were observed at the different timing of Na increasing in sweat and Na decreasing in urine derived from increase of sweat loss during exercise in hot environment. Measuring changes salty taste sensitivity would objectively assess the condition in balance of body fluid during exercise and may be original one of the suggestion for safe management and conditioning during exercise in hot environment.
DESCENTE SPORTS SCIENCE Vol.37/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
The purpose of this study was to investigate the availability of salty taste sensitivity during exercise for the prevention of heat disorders in the hot environment. Twelve health young males were volunteered in this study. This study was consisted of two investigations: the basic experiment (n=6) was to verify the changes of salty taste during stay at rest for 30 minutes or exercise stress for 30 minutes (exercise intensity: 50 % of predicted HRmax) in artificial weather room, and the other field investigation (n=6) was to estimate during basketball games for twice (each game: 10 minutes) under warm environment (Temperature: 26.5 ℃,Relative humidity: 72.2 %). The salty taste sensitivity, body weight, sweat loss, urinary electrolyte, the degree of salty appetite were measured before and after the game. Salty taste sensitivity and body weight after the exercise were significantly lower than that of before in 25 ℃, 35 ℃ and the field investigation (p<0.05). There were no large changes of Na and Cl in urine in the basic experiment. However, Na and Cl in urine after the game were significantly lower than that of before in the field investigation (p<0.05). It may be suggested that decrease of salty taste sensitivity and increase of salty appetite sensation were observed at the different timing of Na increasing in sweat and Na decreasing in urine derived from increase of sweat loss during exercise in hot environment. Measuring changes salty taste sensitivity would objectively assess the condition in balance of body fluid during exercise and may be original one of the suggestion for safe management and conditioning during exercise in hot environment.
DESCENTE SPORTS SCIENCE Vol.37/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
| Researcher | Yusuke Takagi*1, Kazutoshi Seki*2, Hiromi Kitamura*2, Masayoshi Yamamoto*3, Sho Onodera*4 |
|---|---|
| University or institution | *1 Nara University of Education, *2 University of Marketing and Distribution Sciences, *3 National Institute of Fitness and Sports in Kanoya, *4 Kawasaki University of Medical Welfare |
Keywords
hot environment, exercise, salty taste sensitivity, basketball, heat disorders