男大学生VO2max与心功能适应指数及PWC170关系

目的了解男性大学生最大摄氧量(VO₂max)、心功能适应指数和体力劳动能力(PWC₁₇₀)情况,分析VO₂max的变化及其与后两者的关系。方法对322名男性大学生运用二级阶梯负荷实验法测定心率变化,依据公式计算VO₂max、心功能适应指数和PWC₁₇₀值。结果322名男性大学生VO₂max均值为(43.41±3.68)ml/(min·kg);心功能适应指数均值为(99.19±14.10);PWC₁₇₀均值为(940.82±188.07)(kg·m)/min;按照VO₂max的等级分组,发现随着VO₂max的增高,心功能适应指数和PWC₁₇₀也逐渐升高;VO₂max<44 ml/(min·kg)组与VO₂max≥44 ml/(min·kg)组心功能适应指数和PWC₁₇₀的变化差异有统计学意义(P<0.01)。结论男性大学生心功能适应指数和PWC₁₇₀的变化与VO₂max呈显著相关。即VO₂max水平高者,心功能适应指数和PWC₁₇₀的水平也高。提高大学生VO₂max水平对增强学生体质具有重要意义。

Relationship between maximal oxygen uptake and fitness index of cardiac function and physical work capacity of male college students

ObjectiveTo measure the maximal oxygen uptake(VO₂max),the fitness index of cardiac function and the physical work capacity(PWC₁₇₀)and analyze the change of VO₂max and related factors.MethodsThrough measuring the change of heart rate of the 322 male college students,two steps exercise testing method was used to calculate the value of fitness index of cardiac function and PWC₁₇₀ according to formulas.ResultsThe mean VO₂max of the 322 male college students was(43.41±3.68)ml·min^-1·kg^-1.The mean fitness index of cardiac function was(99.19±14.10)and the mean PWC₁₇₀ was(940.82±188.07)kg·m/min.Based on different groups of the VO₂max,we found that the fitness index of cardiac function and the PWC₁₇₀ rose with the increasing of the VO₂max.Moreover,the subjects were divided into two groups by VO₂max.One was<44 ml·min^-1·kg^-1 and the other was≥44 ml·min^-1·kg^-1.The fitness index of cardiac function and the PWC₁₇₀ were compared between the two groups,both of them had significant difference(P<0.01).ConclusionThe fitness index of cardiac function and the PWC₁₇₀ of male college students are closely related to the VO₂max.The fitness index of cardiac function and the PWC₁₇₀ rise with the increasing of the VO₂max.And therefore,it is of great significance to improve the college students'body constitution through increasing the level of VO₂max.