News and Views from kSero
Exercise May Help Reverse Some Effects of Aging	June 15, 2007
By Marc S. Micozzi, MD, Ph.D.
A recent study in the PLoS scientific journal showed that engaging in weight training regularly can offset skeletal muscle atrophy and functional impairment associated with aging. Seniors who participated in six months of gentle exercises had almost as much energy and strength as people less than half their age (who presumably did not exercise). The study involved training twice a week for an hour with participants utilizing basic gym equipment and engaging in commonly offered exercise sessions. After six months the researchers harvested tissue samples from thigh muscles and found not only that muscles were stronger but that some of the cellular features associated with aging were seemingly reversed. Researchers now intend to examine whether running, swimming or other stamina building exercises can have the same effect. As the population continues to age, information is building about scientifically valid methods of slowing or reversing cellular aspects of the aging process. The good news is that the greatest benefits for most people come from just moderate levels of exercise, compared to leading a sedentary life. Extreme exercise and physical activity are not needed for good health, and may even become counterproductive.