Aging Effects on Muscle Properties and Human Performance

摘要: Elderly humans show large declines in functional abilities and changes muscle properties compared to young ones. The purpose of this chapter is relate the age-related reductions maximum force production sustained power output (i.e., endurance) found elderly. Muscle atrophy accounts for more than half decline production. remainder can be explained by a reduction per cross-sectional area fibers. Neither impaired neural recruitment muscles nor decrease proportion fast fibers appears contribute significantly loss with age. Instead, alterations both excitation–contraction coupling contractile elements are possibilities account Nearly equal contributions volume oxidative responsible output. capacity elderly stems from lower mitochondrial density volume. Thus, size intrinsic largely © 2001 Academic Press.