Sarcopenia is characterized by the loss of skeletal muscle mass and strength. This condition increases the risk for frailty, falls, fractures and disability in older adults. Many studies have explored how diet and exercise can help maintain muscle in order to prevent functional decline and preserve quality of life. Both dietary protein and physical exercise play key roles in building and maintaining muscle. Learn about research on the amount, quality, and timing of protein and the effect of dairy protein in particular on muscle mass in older adults.