The inclusion criteria were: (1) research studies on the effects of aerobic exercise training in individuals with stroke, (2) studies which used peak VO2 or peak workload as outcome measures to indicate aerobic capacity, (3) randomized controlled trials (RCTs). Aerobic exercise training is defined as a structured exercise program that involves the use of large muscle groups for extended periods of time in activities that are rhythmic in nature,including but not limited to walking, stepping, running, swimming, cycling, and rowing.