What’s the difference between sarcopenia and frailty?

Many symptoms of sarcopenia and frailty overlap. Both conditions feature weakness, fatigue, and unintentional weight loss. Sarcopenia is a condition that features decreased muscle mass and strength, while frailty is a complex syndrome that arises from multiple health problems. Thus, sarcopenia — which focuses on the size and function of muscle — can be one of the causes of frailty.