Muscle Mass Not Related To Training Speed

Training velocity has no effect on muscle hypertrophy in young or old men and women— according to a study from the University of Michigan. People lose muscle mass as they age— a condition called sarcopenia. Aging also causes poor communication between muscle fibers and their nerves. Researchers compared the effects of weight training velocity on muscle strength and size in the young (aged 20 through 30) and older (65 to 80 years old) men and women participating in a 14-week program. Muscle size increased 8-12 percent in both groups, but training velocity did not affect the results. Developing muscle tension at fast or slow speeds was equally effective for increasing muscle mass. (Journal of Applied Physiology, 111:1021-1030)