Exercise May Protect Against Muscle Fatigue in Cold Environment

by Iswarya on  August 15, 2018 at 3:07 PM Research News
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Exercise may help people who are exposed to extreme temperatures, protect themselves from muscle fatigue, reports a new study. The findings of the study are published in the Journal of Physiology.
Exercise May Protect Against Muscle Fatigue in Cold Environment
Exercise May Protect Against Muscle Fatigue in Cold Environment

Shivering is one of the first defences against cold and it boosts the body's heat production. Shivering can only warm you up for so long and after a few hours your muscles will run out of fuel and will grow too tired to contract.

Exercise helps build-up muscle in the limbs and this new research shows that this exercise could help the muscle shiver longer and keep people warmer for longer. Therefore this suggests that people preparing to live in extremely cold conditions should exercise in order to protect against fatigue to their muscles caused by shivering.

The study, conducted by the University of Guelph and the University of Copenhagen, assessed mice that had trained with voluntary wheels and had been exposed to cold temperature conditions. During cold exposure, their changes in body weight, food intake, blood sugar levels and rectal temperature were measured, in addition to an examination of their limb muscle and fat tissue. Mice that did not exercise lost a significant amount of weight when exposed to the cold however exercise-trained mice were better able to maintain their core temperature.

It is important to note that the researchers were unable to directly measure limb muscle activity during cold exposure, which will be essential for future exploration.

David C. Wright, the corresponding author on the study, commented on the future direction of the work 'In this study we show that exercise training helps build limb muscle and in turn offers better protection against cold conditions. We would now like to determine if the responses that we saw in males also occurred in females. It would also be interesting to determine if obesity impacts the effects that we saw.'

Source: Eurekalert

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