健康中老年人功率踏车试验达70%最大心率时的心血管反应

Cardiovascular response at the rate of work at 70% maximal heart rate on ergometry cycle in healthy middle-aged and elder people

目的了解中老年人以 70 %的最大心率为靶心率的踏车试验心血管反应 ,为制定心肺疾病患者及中老年人健身运动处方提供参考。方法 36名受试者进行逐级功率踏车试验 ,直到达靶心率为止 ,记录心电、血压、踏车功率 ,并换算为代谢当量。结果所有受试者都完成了运动试验 ,均无胸闷、胸痛、气短、疲劳感。整理运动 8分钟后心率恢复至试验前 ,大部分受试者血压均有所降低。达靶心率时的踏车功率 ,中年男性为 (98± 10 2 3)W ,女性为 (64± 11 13)W ;老年男性为 (75± 8 2 5 )W ,女性为 (5 0± 9 2 3)W ,有明显差异 (P <0 0 1)。代谢当量中年男性为 (5 82± 0 83) ,女性为 (4 2 5± 0 63) ,老年男性为 (5 75± 1 2 5 ) ,女性为 (4 0 5±0 93) ,中老年人之间无差别 (P >0 2 0 )。结论健康中老年人以 70 %的最大心率踏车试验 。

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.