Regular physical exercise acts to slow the characteristic loss of muscle mass and strength that occurs with aging, a condition known as sarcopenia once it reaches the point of frailty. In this, strength training appears to work more effectively than aerobic exercise, but both have their place in the overall picture. In the paper here, researchers report on their assessment of proteomic changes with both aging and exercise. They find that, much as expected, the changes in protein levels that occur with age are largely opposed by the changes in protein levels caused by physical activity.
The decline in muscle strength is one of the most striking phenotypes of aging, which is only partially accounted for by a reduction in muscle mass, suggesting a loss of cellular and molecular integrity of muscle tissue, and/or impairment of neuromuscular control with aging. Low muscle strength is a powerful, independent predictor of slow gait, mobility disability, and early mortality. No interventions are currently available that can prevent or attenuate the decline in muscle strength with aging except exercise, especially resistance training. In spite of this evidence, the percentage of people who regularly exercise is still low and this percentage declines with