what causes muscle wastage
Muscle Atrophy. Muscle atrophy is when muscles waste away. The main reason for muscle wasting is a lack of physical activity. This can happen when a disease or injury makes it difficult or impossible for you to move an arm or leg.You may have muscle loss if one of your limbs appears smaller (not shorter) than the other.iseases can cause muscles to waste away or can make movement difficult, leading to muscle atrophy. These include: 1  amyotrophic lateral sclerosis (ALS, also known as Lou Gehrigâs disease), which affects nerve cells that control voluntary muscle movement.