Each year, hundreds of men and women in their seventies, eighties and nineties who participate in marathons and triathlons dispel the old belief that sickness and deterioration are a necessary part of the aging process. Scientific evidence accumulates daily, proving that with regular exercise, older adults can experience good health and vitality for the duration of their lives. Study after study has shown that seniors are not only capable of strenuous exercise, but can vastly improve their health, strength, mobility and independence, using exercise as a tool.