Effects of Exercise on Human Energy Metabolism in High Temperature and High Humidity Environment

Abstract

Introduction Many exercise enthusiasts have started participating in sports in the high-temperature environment in recent years due to the increasing popularity of these sports habits. However, their scientific studies still have a gap in their safety and effectiveness. Objective Measure the energy supply characteristics of fat and sugar oxidation during exercise in different high-temperature and humidity environments. Methods 20 healthy adult subjects were exposed to fixed-intensity exercise for 20 minutes at 30-33 oC, 20% relative humidity (RH), and 50% RH, respectively. Results Under the silent exposure condition, compared with RH 20% and RH 50% under high temperature, sugar oxidation was significantly increased (P<0.01), while fat oxidation was significantly reduced (P<0.01), and total energy consumption was significantly increased (P<0.01). Under the condition of 65% VO2 max exercise, compared with RH 20% and RH 50% at high temperatures, the amount of sugar oxidation was significantly reduced (P<0.05), and the total energy consumption was significantly reduced (P<0.05). Conclusion Under 65% exercise under VO2 max in the high temperature and humidity-controlled environment, the high temperature and medium humidity (RH 50%) environment consumes more energy, and there is a greater amount of sugar oxidation. Level of evidence II; Therapeutic studies - investigating treatment outcomes.

Spatial analysis of the prevalence of abdominal obesity in middle-aged and older adult people in China: exploring the relationship with meteorological factors based on gender differences

“…It is worth noting that the Northeast and Southwest regions are the coldest and hottest regions in China, respectively, and their extremes of temperature have a more pronounced effect on obesity prevalence, which explains the stronger effect of AMIT and AMAT on obesity prevalence in this region. In terms of humidity, the body needs to expend more energy to maintain body temperature and metabolic regulation in a higher humidity environment ( 48 ), which may help to burn excess fat and thus reduce the risk of obesity ( 49 ). Meanwhile, the Southeast region has the highest average annual humidity in China, which may lead to a stronger link between humidity factors and the risk of obesity prevalence in this region compared to other regions.…”