【摘要】 目的:探讨模拟高原环境下急性骑行对自行车驴友运动能力的影响。方法:受试对象为7名华南农业大学一年级男性学生,平均年龄19.80±0.83岁,为自行车驴友,没有高原旅行经历。受试者分别在常氧环境和模拟常压低氧环境(氧含量16.8%)进行踏功率自行车运动,强度从50W(50rpm)开始,每3min递增50W至250W,然后要求受试者以最大能力运动至力竭,测试指标包括运动前、每级负荷后即刻和运动后心率、RPE、血乳酸及力竭时间。结果:两种环境下的心率与RPE均随着运动强度的增大而呈上升趋势,在模拟高原环境下从150W至250W以及力竭后心率上升幅度高于常氧,而RPE从150W后至运动结束时也高于常氧环境,但均无统计学差异(P>0.05),并且力竭时间非常显著性缩短(P<0.01)。结论:高原环境下自行车驴友骑行能力有一定下降,提示自行车驴友初入高原时要适当降低骑行强度及作适当的休息。更多还原

【Abstract】 objective: Bicycle travelers’ acute cycling capacity under simulated plateau environment is investigated. Methods:Seven subjects were freshmen students of south China Agricultural University,average age was 19. 80 ± 0. 83 years,They are all bicycle travelers and have no plateau travel experience. They had done bicycle with their maximize ability to exhaustion,The step power cycling of subjects is from 50w( 50RPM) to 250 w,increasing 50 W every 3minute in normal environment and simulation plateau environment( 16. 8% oxygen),Indexes including heart rate,RPE and blood lactic acid before were assayed,both after exercise and immediately in per load level. Results: Both heart rate and RPE were increasing with the increase of intensity in two kinds of circumstances,from 150 w to 250 w or exhaustion,Heart rate of the simulated plateau was higher than normal environment,RPE was higher than normal environment from 150 w to the end,but all had no significantly difference( P > 0. 05),and the exhaust time was significantly shortened( P < 0. 01). Conclusions: The capacity of the bicycle travelers has certain reduced under plateau environment,so the bicycle travelers should reduce the strength and have proper rest when they first go to the plateau.更多还原