As people age, muscles naturally lose mass and strength, a condition known as sarcopenia. The decline can make everyday activities harder and increases the risk of falls, disability, and early death.

Split hand is a phenomenon where muscles on one side of your hand weaken. It often has links with early ALS, though some other rare conditions may also cause it. Amyotrophic lateral sclerosis (ALS) ...

Adult-onset spinal muscular atrophy (SMA) is a rare neuromuscular disorder that primarily affects the motor neurons in the spinal cord, leading to muscle weakness and atrophy. SMA is part of a group ...