摘要
[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 assess the relationship among heart rate （HR）, minute ventilation （VE）, and oxygen uptake （VO2）, and choose an optimal fitting function to find simple indicators for the evaluation of physical workload in plateau.[ Methods ] Seventy-eight healthy males working at different altitudes were recruited in the study. An incremental cycle ergometer test until volitional fatigue was performed on all participants. Physiologic parameters, including VO2, VE, and HR, were recorded in a computerized test system. The optimal regression equation was chosen from fitting curves between VO2 and VE and between VO2 and HR. [ Results ] Under the same physical workload and at varied altitudes, VO2 （P=0.505） and heart rate （P=0.306） did not show differences, but VE were significantly different （P〈0.001）. At the same altitude and under varied physical workloads, VO2, HR, and VE were statistically different among the workers （P〈0.001）. The optimal regression equation showed that the relationship between VE and VO2 （R2=0.903） was stronger than that between HR and VO2 （R2=0.583）, which＇indicated that the power function of VE and VO2 was the best in data fitting. Further analysis found that VE under standard temperature and pressure, dry （VEsTPD） was better fitted with VO2 than VE. The resulted fitting function was）yvo2=0.06x^0.861veSEEP, R^2=0.930.
出处
《环境与职业医学》
CAS
CSCD
北大核心
2017年第10期864-867,共4页
Journal of Environmental and Occupational Medicine
关键词
高原
体力劳动强度
摄氧量
肺通气量
心率
plateau
physical workload
oxygen uptake
minute ventilation
heart rate
