Fatigue could reduce skills and cause injuries and muscle weakness during sport because the brain does not consider the extra effort required for movement, Monash University researchers have found.
Professor Uwe Proske, from Monash’s Department of Physiology, found when muscles were weakened from overuse or fatigue, limb control was affected,particularly if the person couldn’t see their limbs.
The study, which has been published in the Journalof Physiology , showed muscles needed to work harder to compensate for fatigue, which led touncertainty about where the limb was. "In the absence of sight, people judge the position of their limbs based on the amount of effort required to lift them against the force of gravity," Professor Proske said. "Take gravity away, as happens to astronauts, and they have real trouble carrying out skilled movements.
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