Aging is characterized by changes in body composition. This decrease in caloric burn lends itself to weight (fat) gain. Mechanistically, muscle atrophy is the result of an imbalance between muscle protein synthesis and muscle protein breakdown. Muscle work and protein consumption both act as powerful stimuli for muscle protein synthesis or anabolism. But when it comes to counteracting the body composition changes associated with aging, both target and technique are specific.

Source: Huffington Post February 26, 2017 20:16 UTC