Which of the following statements about sleep is false?

Voluntary muscle activity typically decreases during sleep rather than increases. During the sleep cycle, particularly in the deeper stages of sleep, the body enters a state of reduced muscle tone and activity, which allows for restorative processes to take place. Muscle activity is generally low, promoting recovery and healing rather than enhancing voluntary movements.

In contrast, the other statements reflect well-established benefits of sleep. Tissue healing and repair are indeed crucial processes that occur during sleep, especially during deep sleep stages, where growth hormone is released, aiding recovery. Sleep also plays a vital role in refreshing and renewing both physical and mental well-being, contributing to life quality and cognitive function. Moreover, adequate sleep is known to alleviate stress, tension, and anxiety, which underscores its importance for psychological health. Thus, the claim that voluntary muscle activity increases during sleep is inconsistent with the established understanding of sleep physiology.