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应用寒冷血管反应指数（ＶＲＣＩ）评价入藏年限不同的汉族战士、世居高原的藏族中青年以及移居平原４～５年的藏族学生的耐寒能力，旨在探讨高原低压缺氧对耐寒能力的影响。结果表明：随着人体对高原环境的适应，ＶＲＣＩ有一个从降低到逐渐回升的过程，即初入高原汉族新兵组ＶＲＣＩ最高，高原一年兵组ＶＲＣＩ最低。随着在高原服役时间的延长，耐寒力逐渐有所恢复。汉族三年兵组ＶＲＣＩ稍高于汉族二年兵组，而显著地高于汉族一年兵组。世居高原的藏族中青年ＶＲＣＩ明显地高于在高原服役１～２年的汉族战士组。移居平原４～５年的藏族学生ＶＲＣＩ非常明显地高于长居高原的藏族学生，表明高原低压缺氧能够显著降低人体的ＶＲＣＩ，因而能明显地降低人体的耐寒能力。推荐寒冷血管反应指数可用作为判断高原战士耐寒能力的指标。
Cold tolerance index (VRCI) was used to evaluate the cold tolerance of Tibetan soldiers who lived in different ages, Tibet middle-aged youth living in the plateau, and Tibetan students migrating to the plain for 4-5 years. The aim was to investigate the effect of plateau hypobaric hypoxia on cold hardiness . The results show that with the adaptation of the human body to the plateau environment, VRCI has a process from decreasing to gradually increasing. That is to say, the VRCI of the recruits entering the Plateau is the highest, while the VRCI of the GIs in the Plateau is the lowest. With the extended service time in the plateau, cold hardiness gradually recovered. The VRCI of the Han three-year military was slightly higher than that of the Han two-year military and significantly higher than that of the Han one-year military. The VRCI of Tibetans in the plateau is obviously higher than that of the Han soldiers who have served in the plateau for 1 to 2 years. VRCI, a Tibetan student who migrated to the plain for 4 to 5 years, was significantly higher than that of Tibetan students on the plateau, indicating that hypobaric hypoxia at the plateau can significantly reduce VRCI of the human body, thus significantly reducing the body’s cold tolerance. Recommended cold vascular response index can be used as indicators to determine the ability of plateau soldiers cold tolerance.