采用生物电阻抗法测量了西北民族走廊15个人群6687例样本的体脂率、肌肉量。肥胖程度对西北民族走廊人群的握力、心率和餐后血糖影响不大，会导致高血压率的升高，降低血氧饱和度、肺活量，促使空腹血糖升高，增加糖尿病发病率。相关分析显示，男性肌肉量与收缩压、舒张压呈显著正相关。女性肌肉量与收缩压无明显相关，与舒张压呈显著正相关。肌肉量对空腹血糖、餐后血糖无明显影响。男性、女性体脂率与收缩压、舒张压均呈显著正相关，与血氧饱和度、肺活量呈显著负相关。肌肉量与握力、肺活量均呈显著正相关。双因素方差分析显示，体脂率、肌肉量对血压影响存在主效应，二者对血压影响不存在交互效应。研究结果提示，人群的形成与演化对生理指标值会产生重要影响。

The body fat percentage and muscle mass were measured in 6687 samples from 15 populations in the Northwest Ethnic Corridor using the bioelectrical resistance method. It has been found that the degree of obesity has little effect on grip strength, heart rate, and postprandial blood glucose in the Northwest Ethnic Corridor population,which would lead to the increase of hypertension rate, decrease of blood oxygen saturation and lung capacity, promote the increase of fasting blood glucose and increase the incidence of diabetes. Correlation analysis showed that muscle mass was significantly and positively correlated with systolic and diastolic blood pressure in males. In females, muscle mass was not significantly correlated with systolic blood pressure and was significantly positively correlated with diastolic blood pressure. Muscle mass had no significant effect on fasting blood glucose and postprandial blood glucose. Body fat percentage was significantly and positively correlated with systolic and diastolic blood pressure in males and females, and significantly and negatively correlated with oxygen saturation and lung capacity. Muscle mass was significantly positively correlated with both grip strength and lung capacity. A two-way ANOVA showed that there was a main effect of body fat percentage and muscle mass on the effect of blood pressure, and no interaction effect of the two on the effect of blood pressure. The results of the study suggest that the formation and evolution of populations can have a significant impact on the values of physiological indicators.