摘要
目的比较基于运动心率和血氧饱和度的系列指标评价久居高原军人有氧运动能力的准确性。方法在常驻3850 m、4100 m、4550 m 3个海拔的高原军人240人和平原对照组76人中,进行了3000 m跑成绩和期间Borg自觉用力程度评分的调查,通过两级定量负荷踏阶观察了运动前、中、后心率(heart rate,HR)与血氧饱和度(SaO2),在此基础上计算PWC170/150,根据军标方法估算最大摄氧量(VO2max)和台阶指数,并计算运动前后血氧饱和度差值(ΔSaO2)。同时测定运动后血乳酸和心肌酶。对各数据进行海拔间比较和指标间关联性分析。结果在4100 m以上高原,较高强度运动后心率增高幅度相比平原受限且个体差异较大,导致PWC170/150不符合体能随海拔增高而下降的事实和个体3000 m跑成绩。由较低强度运动后即刻心率推算的VO2max和由运动后恢复期心率衍生出的台阶指数和个体实际体能与心肌酶有一定相关性。相比之下,踏阶运动前后血氧饱和度差值ΔSaO2与海拔高度、个体实际体能、运动后血液乳酸和心肌酶谱等生化指标的相关性最好。结论运动后血氧饱和度降低值是评价高原军人有氧运动能力的较可靠指标。
Objective To compare the accuracy of different indexes based on heart rate and blood oxygen saturation level for evaluating aerobic exercise capacity among the military staff serving in high-altitude regions.Methods We recruited 240 subjects from the military staff stationed in high-altitude(ranging from 3850 m,4100 m and 4550 m)regions and 76 subjects serving in a low-altitude(below 500 m)region.We tested the performance of the subjects in 3000-meter running and assessed their Borg’s rating of perceived exertion(RPE)during the exercise.The heart rate(HR)and blood oxygen saturation(SaO2)were recorded before,during and after two-level quantitative loaded step exercise to calculate the physical work capacity at 170/150 beats/min(PWC170/150),maximal volume of oxygen uptake(VO2 max)and step index.The difference in SaO2(ΔSaO2)before and after the exercise was analyzed,and the changes in blood lactate levels and myocardial enzymes were measured.The data were compared between the 2 altitude groups to analyze the correlation of the indexes with the exercise capacity of the subjects.Results At a high altitude,the elevation based on HR after intense exercise was more limited and showed a greater individual variation than at a low altitude,which caused PWC170/150-based assessment to show discrepancy between the fact that physical exercise capacity decreases with the elevation of altitudes and the performance of the individual subjects in 3000-meter running.VO2 max estimated from immediate HR after low-intensity exercise and the step index derived from HRs during post-exercise recovery period were mildly correlated with the physical capacity and myocardial enzyme profiles of the subjects.ΔSaO2 after step exercise showed the best correlation with the altitudes,physical exercise capacity,blood lactic acid level and myocardial enzyme profiles after exercise.Conclusion The decrease of oxygen saturation after exercise is a reliable index for evaluating aerobic exercise capacity among military staff in high-altitude regions.
作者
李鹏
谢慎威
向彬
黄河
张钢
高钰琪
LI Peng;XIE Shenwei;XIANG Bin;HUANG He;ZHANG Gang;GAO Yuqi(Department of High Altitude Operational Medicine,Faculty of High Altitude Military Medicine,Army Medical University(Third Military Medical University),Chongqing,400038;Institute of Medicine and Hygienic Equipment for High Altitude Region,Faculty of High Altitude Military Medicine,Army Medical University(Third Military Medical University),Chongqing,400038;Key Laboratory of Extreme Environmental Medicine of Ministry of Education,Key Laboratory of High Altitude Medicine of PLA,Faculty of High Altitude Military Medicine,Army Medical University(Third Military Medical University),Chongqing,400038;Shigatse Hospital of Second Affiliated Hospital,Army Medical University(Third Military Medical University),Shigatse,Tibet Autonomous Region,857000,China)
出处
《第三军医大学学报》
CAS
CSCD
北大核心
2020年第6期588-593,共6页
Journal of Third Military Medical University
基金
军队后勤科研重大项目(AWS14L005)
重点项目(BWS17J031)
军事医学创新工程项目(16CXZ014)。
关键词
高原
有氧运动能力
评价
血氧饱和度
作业能力
体能
high altitudes
aerobic exercise capacity
evaluation
oxygen saturation
physical work capacity
physical fitness
作者简介
通信作者:高钰琪,E-mail:gaoy66@yahoo.com。
