Happy Wednesday Morning!!! Weight training is an important discipline of my workouts. As I get older, I see the importance of implementing a weight training program. If you are not lifting weights at least twice a week, I encourage you to start. Have a great day!! With honor, CM National Academy of Sports Medicine: Loss of muscle mass, also known as Sarcopenia occurs as a result of aging. After age 35 you will lose between .5-1. Percent of your muscle mass annually unless you engage in regular physical activity to prevent it. By engaging in regular resistance training and following a sound diet that includes adequate amounts of protein, you can prevent most of the muscle loss associated with age. Health experts recommend that you engage in some of the resistance training that focuses on all major muscle groups a minimum of 2 times per week and up to 5 times per week depending upon your goals.