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为了给高原体力活动者的负荷安全限度提供依据，本文采用自身对照研究方法，对７名健康男性在海拔４５０ｍ、２２６０ｍ、３０００ｍ、３４５０ｍ和４１００ｍ５个地区进行了自行车功量计负荷运动，测试了每一海拔静息和５０Ｗ、１００Ｗ、１５０Ｗ负荷后即刻心率、血氧饱和度和心电图检查、负荷后５分钟心率恢复时间。结果显示：静息和同一负荷运动后心率随海拔增高明显增加（Ｆ值分别为１６５，３５、１５９．８８、６７．９３和３４．４７；相邻海拔间两两比较ｑ值范围为１０．０１～１０４．９２）；相同海拔随负荷量增大心率也明显增快（５０Ｗ：静息、１００Ｗ：５０Ｗ、１５０Ｗ：１００Ｗ的ｔ值为４．４１０、２．４０６和３．０８４）。海拔增高和负荷加重时心率恢复时间延长、心电图ＳＴ一Ｔ改变率增多、血氧饱和度明显下降。结果提示高原地区人体生理负荷明显增大。建议海拔３５００ｍ为重度体力活动限度、４０００ｍ为中度体力活动限度。
In order to provide a basis for the workload safety limit of plateau physical activity, this paper uses a self-control study method to carry out bicycle power meter load exercise on seven healthy males at 450m, 2260m, 3000m, 3450m and 4100m5, An altitude of rest and 50W, 100W, 150W immediately after the load heart rate, oxygen saturation and ECG, 5 minutes after the load heart rate recovery time. The results showed that the resting heart rate and the heart rate after exercise increased significantly with increasing altitude (F values were 165,35,159.88,67.93 and 34.47 respectively; 01 ~ 104.92). At the same altitude, the heart rate increased obviously with the increase of the load (50W: resting, 100W: 50W, 150W: 100W), the t values were 4.410, 2.406 and 3.084. Increased altitude and load exacerbation of heart rate recovery time, ECG ST-T change rate increased, oxygen saturation decreased significantly. The results suggest that the physiological load on the plateau increased significantly. Recommended altitude of 3500m for the heavy physical activity limits, 4000m for the moderate physical activity limits.