Effects of Aerobic Exercise Training: Over the past ten years, we have learned that older persons can adapt to a program of regular aerobic training as well as their younger counterparts. Older adults can achieve the same 10 to 30 percent increase in VO2max in response to endurance exercise training as young adults. The magnitude of these adaptations in VO2max in older adults is a function of training intensity; low intensity training elicits only marginal changes. The increase in VO2max in older adults is a result of improvements in both maximal cardiac output and a-v O2 difference. In addition, improvements in submaximal endurance capacity and the greater ability to tolerate higher