Relationships of Cardiac Pulmonary and Muscle Reserves and Frailty to Exercise Capacity in Older Women

摘要

BackgroundA decline in exercise capacity (EC) is a characteristic of frailty. We hypothesized that decline is the effect of decrements in several physiological systems. We assessed whether the relationship of three main physiological systems—cardiac, pulmonary, and musculoskeletal—to EC is independent or interactive and whether their effect on EC varies with respect to frailty status.