What is Muscle Atrophy?

Muscle atrophy is the shrinking or loss of muscle mass and strength. It happens when muscles are not used enough or when a medical condition affects the muscles or nerves that control them.

There are two main types:

1. Disuse atrophy – Caused by not using a muscle for a period of time, such as:

   • Being on bed rest

   • Wearing a cast after a broken bone

   • Living a sedentary lifestyle

   • Reduced activity due to illness or injury

     
     

2. Neurogenic atrophy – Caused by damage to the nerves that control muscles. This is usually more severe and can occur with conditions such as:

   • Amyotrophic lateral sclerosis

   • Muscular dystrophy

   • Spinal cord injuries

   • Peripheral nerve injuries

     
     

Symptoms may include:

• Smaller or thinner muscles

• Muscle weakness

• Difficulty performing everyday tasks

• Fatigue during physical activity

Can it be reversed?

• Disuse atrophy is often reversible with regular exercise, especially strength training, along with adequate protein intake and proper nutrition.

• Neurogenic atrophy may improve depending on the underlying cause, but treatment often focuses on managing the nerve condition and maintaining muscle function through rehabilitation.

  
  

If you notice unexplained muscle loss, especially if it's accompanied by numbness, severe weakness, or pain, it's important to see a healthcare provider to determine the cause and begin appropriate treatment.