What does the term "muscle atrophy" refer to?

Muscle atrophy refers to the decrease in muscle size due to disuse or lack of stimuli. This condition often occurs when muscles are not used regularly, leading to a reduction in their mass and strength. Factors contributing to muscle atrophy include prolonged inactivity, such as bed rest or immobilization, and diseases that affect the muscles or nervous system.

When the muscles are not engaged in regular physical activity, they receive fewer signals for growth and maintenance, which can lead to the breakdown of muscle fibers and a significant reduction in muscle volume. This understanding highlights the importance of regular exercise and physical activity for maintaining muscle health and preventing atrophy.