中等强度定速身体锻炼期间不同时段的主观体力感知评级及其精确性

RPE During Moderate Intensity Fixed Speed Exercise and Its Accuracy

目的:探究中等强度定速身体锻炼期间不同时段的主观体力感知评级(RPE)、心肺活动状态和情绪状态,并进而推断RPE作为测评指标的精确性。方法:60名被试在跑台上完成中等强度定速跑或走30 min,并在实施前5 min、期间30 min和之后10m in进行RPE、情绪状态自行测评以及生理指标同步监测;将45min均分为9个时段并选择锻炼期间第1时段(t_1)、第2时段(t_2)、第3时段(t_3)、第4时段(t_4)、第5时段(t_5)、第6时段(t_6)的测试数据进行统计和分析;兼顾实验末的访谈核实结果。结果:RPE,t_3、t_4最小,t_2、t_5其次,t_1、t_6最大;心率(HR)t_6高于其余5个时段;耗氧量(VO_2)、相对耗氧量(VO_2/kg)、代谢当量(MET),6个时段基本恒定;积极情绪状态,t_2、t_3、t_4、t_5最佳,t_1其次,t_6最差;消极情绪状态,t_6最甚,t_5其次。结论:身体锻炼期间的心肺活动状态变化与RPE变化很不一致且处于积极情绪状态时伴随RPE低估于HR现象,故若将RPE作为中等运动强度测评指标则需兼顾情绪状态等第三变量的影响;身体锻炼期间,1/4被试进入了一种宁静的自我状态。

Objective: RPE,cardiopulmonary state and emotional state of different time buckets of moderate intensity fixed speed exercise were explored. Methods: The sixty subjects completed successively 30 minutes jogging( or walk) with fixed appropriate running speed of moderate intensity( subjects had showed appropriate running speed during previous experiment with adjusted speed by themselves) on treadmill,and subjects evaluated their RPE( rating of perceived exertion) and emotional states by themselves before 5 min,during 30 min and after 10 min,and physiological indicators were monitored synchronously. 45 min were divided into nine time buckets,and emotional and physiological state data of six time buckets( t_1,t_2,t_3,t_4,t_5 and t_6) during exercise were counted and analyzed. Results of interview to verify were taken into account. Results: RPE,minimum value appeared during t_3,t_4 and maximum value appeared during t_1,t_6; HR,maximum value appeared during t_6;V_2,VO_2/kg,MET,essentially constant; positive emotional state,best value appeared during t_2,t_3,t_4,t_5 and worst value appeared during t_6; negative emotional state,worst value appeared during t_6 and t_5 followed.Conclusion: Cardiopulmonary activity status changed and RPE changed were inconsistent during moderate intensity fixed speed exercise,and in a state of positive emotion with RPE undervalued in HR phenomenon. Therefore,the influence of the third variable( emotional state) should be taken into account when RPE as indicator of moderate exercise intensity. A quarter of the participants into a kind of halcyon ego state during exercise.