Effects of Low Water Temperature on Free Radical Metabolism in Swimming Mice

  • Fujun Wang
Keywords: Exercise Fatigue, Cold Stress, Free Radical Metabolism Level, MDA Content, SOD Content


Because in sports training, competition or exercise, it is often affected by different environmental
temperature, and even affects the exercise ability. There is no report on whether exercise affects free radical
metabolism to accelerate fatigue under unsuitable temperature. The purpose of this paper is to explore the effect
of low temperature on the metabolism of free radicals in the exercise body, in order to provide a theoretical basis
for the further study of exercise-induced fatigue and find a better way to delay the occurrence of fatigue under
low temperature environment. The chest temperature, malondialdehyde (MDA) and superoxide dismutase (SOD)
activities in liver, brain, myocardium and gastrocnemius of swimming mice in low water temperature were
measured. The results showed that the MDA content of liver, brain and gastrocnemius in mice immersed in 18℃
cold water bath was significantly higher than that immersed in 28 ℃ cold water bath (P < 0.05); the MDA
content of heart and gastrocnemius in mice swimming in 18℃ cold water bath was significantly higher than
that immersed in 28℃ (P < 0.05), and the MDA content of liver and brain were significantly higher (P < 0.01),
It is suggested that the level of lipid peroxidation in the exercise body increases obviously in the low
temperature environment, which can accelerate the generation of exercise-induced fatigue. Under the condition
of low temperature, MDA content increased significantly. The results show that the low temperature
environment factors can promote the production of free radicals and increase the level of lipid peroxidation,
which may also be one of the reasons to accelerate the occurrence of exercise-induced fatigue.