Abstract: ObjectiveTo investigate the exercise capability and the cardiovascular response at the rate of work on ergometry cycle at 70% maximal heart rate(MHR),in healthy middle-aged people(45-60 years old) and the elder people(≥60 years old ),and to offer the information of physical exercise for cardiopulmonary disease patients and formulate exercise prescription for healthy middle-aged and old people.Methods36 objects were sitting on a bicycle ergometer and exercised with a gradual increase of workload to maintain their heart rate at 70%MHR for 3 minutes. The electrocardiogram, blood pressure, rate of work, and metabolic equivalents(METs) were recorded.ResultsAll objects finished this test,without angina pectoris, shortness of breath and fatigue. Heart rate came back to the level before the test in all objects and blood pressure reduced to some extent in most objects,at the 8 minutes after cool down.The rate of work on ergometry cycle at 70%MHR were (98±10.23)W for male,(64±11.13)W for female in middle-aged people,while that was(75±8.25)W for male and(50±9.23) for female in old people﹙P<0.01).METs at 70%MHR were(5.82±0.83) for male and(4.25±0.63) for female in middle-aged people, while that was(5.75±1.25) for male and(4.05±0.93) for female in old people(P>0.20).ConclusionsThe cardiovascular response is safe for healthy middle-aged and older people exercising at 70%Hrmax. It maybe the reference for them to do the physical fitness exercise.

Key words: middle-aged and old people, ergometry cycle, cardiovascular