Your Muscles Remember Inactivity – and Aging Makes It Worse

New research suggests repeated muscle disuse leaves a lasting molecular imprint in skeletal muscle.

After a second bout of inactivity, young muscle showed signs of resilience, while aged muscle suffered greater atrophy.

Older muscle also showed stronger disruption in metabolism- and mitochondria-related genes, pointing to weaker recovery capacity.

The findings may help explain slower recovery after bed rest or injury in older adults and guide better rehab and exercise plans.