青年男性慢速自重抗阻训练能量消耗的模型构建与准确性评估

Model construction and validity test of energy consumption in slow self-weight resistance training with different repetition times

目的:研究不同重复次数慢速自重抗阻训练的能量消耗水平,构建不同动作自重抗阻训练的能量消耗方程,为运动能量消耗的自我监控与科学健身提供实证参考。方法:选取40名健康男性受试者作为测试对象(建模组30人和验证组10人),采用Cosmed K4b 2便携式心肺功能仪分别测量受试者3个不同抗自重动作(标准俯卧撑、站姿提踵以及自重深蹲)在6种重复次数下的能量消耗值。运用重复测量设计的方差分析检验能量消耗和心率的被试内差异,使用逐步多元回归分别构建总能耗模型和不同动作能耗模型,采用Pearson相关分析和Bland-Altman polt等方法评估各模型的整体准确性及不同重复次数下的预测效度。结果:(1)相同重复次数下,3个自重抗阻运动两两之间在能量消耗、心率指标上均存在显著性差异(P<0.05)。(2)总模型:EEm(每分钟能量消耗,energy expenditure per minute,简称EEm)=0.153×重复次数+0.061×心率+0.028×体重-4.656。(3)不同动作模型:EEm(俯卧撑)=0.441×重复次数+0.055×身高+0.025×心率+0.031×体重-11.111;EEm(提踵)=0.104×重复次数+0.013×身高+0.009×心率+0.005×体重-1.714;EEm(深蹲)=0.448×重复次数+0.024×身高+0.016×心率+0.018×体重-4.882。结论:以身高、体重、心率及重复次数4个变量构建的能耗预测方程,能够较为准确地预测慢速自重抗阻训练的运动能耗,可为普通大众运动能量消耗的自我监控与科学健身提供实证参考。

Objective:To study the energy expenditure levels of different repetition times of slow self-weight resistance training,construct the energy expenditure equation of self-weight resistance training of different movements,and provide empirical reference for the self-monitoring of sports energy expenditure and scientific fitness.Methods:40 healthy male samples are selected as test subjects(30 in the modeling group and 10 in the verifiable group),and the Cosmed K4b 2 portable cardiopulmonary function instrument is used to measure the subjects′3 different anti-weight actions(standard push-ups,standing heel lifts and self-weight squats)energy expenditure value under 6 repeated times.The variance analysis of the repeated measurement design is used to test the differences in energy expenditure and heart rate among the subjects.The stepwise multiple regression is used to construct the total energy expenditure model and the energy expenditure model of different actions.Pearson analysis related and Bland-Altman polt are used to evaluate the performance of each model.Overall accuracy and predictive validity under different repetition times.Results:1)Under the same number of repetitions,there are significant differences in energy expenditure and heart rate between the three self-weight resistance exercises(P<0.05).2)Total model:EEm(energy expenditure per minute,EEm for short)=0.153*number of repetitions+0.061*heart rate+0.028*weight-4.656.3)Different action models:EEm(push-ups)=0.441*repetition times+0.055*height+0.025*heart rate+0.031*weight-11.111;Eem(heel lift)=0.104*repetition times+0.013*height+0.009*heart rate+0.005*weight-1.714;EEm(squat)=0.448*number of repetitions+0.024*height+0.016*heart rate+0.018*weight-4.882.Conclusion:The energy expenditure predicting equation,with four varieties of height,weight,heart rate and repetition times can more accurately predict the energy expenditure of slow self-weight resistance training,which can be used for providing empirical reference for self-monitoring of sports energy expenditure and scientific fitness for the general public.