论文部分内容阅读
[目的]探讨高原地区心率(HR)、肺通气量(VE)与摄氧量(VO_2)之间的关系,并拟合最优函数,以探索用于高原体力劳动强度评价的简易指标。[方法]选取不同海拔高度的78名在岗男性工人,用功率车模拟劳动负荷,心肺功能测试系统记录不同劳动负荷下的VE、HR、VO_2。用曲线拟合VO_2与HR、VE的关系,建立最优回归方程。[结果]同等劳动强度下,不同海拔的工人VO(2P=0.505)和HR(P=0.306)的差异没有统计学意义,VE的差异有统计学意义(P<0.001);相同海拔高度,不同劳动强度的工人VO_2、HR、VE的差异均有统计学意义(P<0.001)。曲线拟合显示,VE与VO_22、HR与VO_2的最大决定系数(R)分别为0.903、0.583,可看出VE与VO_2的幂函数效果最佳。进一步分析发现标准状况下的肺通气量(VE2STPD)与VO_2的拟合效果更好;拟合的函数为?VO_2=0.06,R=0.930。[结论]进行高原体力劳动强度评价时,VESTPD可作为替代VO_2的简易评价指标。建立的函数可对作为现行体力劳动强度国家标准的补充和优化。
[Objective] To explore the relationship between heart rate (HR), pulmonary ventilation (VE) and oxygen uptake (VO_2) in plateau area and fit the optimal function to explore the simple indexes for evaluating the physical labor intensity in the plateau. [Method] Seventy - eight male workers at different altitudes were selected to simulate the work load and the cardiopulmonary function test system to record the VE, HR and VO_2 under different work load. Curve fitting VO 2 and HR, VE, the establishment of the optimal regression equation. [Results] There were no significant differences in VO (2P = 0.505) and HR (P = 0.306) between workers at different altitudes under the same labor intensity. The differences in VE were statistically significant (P <0.001); at the same altitude, The labor intensity of workers VO_2, HR, VE differences were statistically significant (P <0.001). Curve fitting shows that the maximum decision coefficients (R) between VE and VO_22, HR and VO_2 are 0.903 and 0.583, respectively. It can be seen that the power function of VE and VO_2 is the best. Further analysis found that the standard conditions of pulmonary ventilation (VE2STPD) and VO_2 better fitting effect; fitting function is VO_2 = 0.06, R = 0.930. [Conclusion] VESTPD can be used as a simple evaluation index to replace VO_2 in the evaluation of physical strength of plateau. The established function can be supplemented and optimized as a national standard for the current manual labor intensity.