航天医学与医学工程

目的探讨高原步行时不同坡度条件下的适宜负重。方法在海拔３７００ｍ高原，选移居半年以上的青年学生１２人进行跑台步行实验。每人参加不同坡度与不同负重的组合实验。根据ＶＥ、ＨＲ和Ｅ随负重增加而出现非线性增加（拐点）所对应的负重量，通过回归方法进行综合分析和确定适宜负重。结果坡度为０°、５°、１０°时，适宜负重分别为２０．５、１３．８和７．１ｋｇ，坡度为１５°时，几乎不宜负重。结论在海拔３７００ｍ高原，坡度每增加５°，适宜负重减少约７ｋｇ

Objective To observe the relationship between optimum carriage load and slope at high altitude. Methods Optimum carriage load was investigated in twelve healthy young men at an altitude of 3700 m.The subjects marched on a treadmill for 10 min at walking speed of 4.0 km/h with different slops(0,5,10,15)and carriage loads(0,7,14,21 and 28% body weight).Ventilation (VE),heart rate (HR) and energy expenditure (E) during marching were measured.The optimum carriage load was estimated by finding the break point of the systematic increase in VE,HR and E. Result Optimum carriage load at walking slope of 0,5,10and 15 were 20.5,13.8,7.0 and 0.4 kg,respectively. Conclusion The relationship between the reduction in optimum carriage load and slope has bee estimated to be on the order of about 7 kg for every slope of 5 at high altitude of 3700 m.