摘要
目的:验证递增负荷运动方案推算最大脂肪氧化强度(Maximal fat oxidation,FATmax)的有效性,为FATmax在运动实践中的应用提供方法学依据。方法:12名超重/肥胖(BMI≥24 kg/m^2)青年男性(年龄:20.6±1.2岁;身高:177.7±4.9 cm;体重:86.8±9.2 kg)在相同实验条件下先后完成两种运动方案测试:1)每2 min逐级递增负荷至力竭运动方案(ST);2)一组5个不同强度(30%O_(2max)、40%O_(2max)、50%O_(2max)、60%O_(2max)和70%O_(2max))恒定负荷运动方案(LT)。采用Cortex Metamax 3B气体代谢分析仪收集两种运动测试中气体代谢情况,计算不同运动强度下脂肪氧化率。以运动强度(O_2和HR)为横坐标,脂肪氧化率为纵坐标,做散点图并通过二项式拟合曲线法推算最大脂肪氧化率(Maximal fat oxidation rate,MFO),MFO对应的运动强度为最大脂肪氧化强度(FATmax)。两种运动测试间隔时间为2天,测试前一天不进行剧烈运动,测试当日不饮用酒精和含咖啡因饮料,测试前至少禁食2h,每名受试者两次测试安排在一天的同一时间进行,测试在温度和湿度相对恒定的实验室中进行。结果:两种运动测试方案推算获得的FATmax对应的摄氧量(FATmax-O_2)、最大摄氧量百分比(FATmax-%O_(2max))和心率(FATmax-HR)无显著性差异(P>0.05),且效应量较小(ES<0.2);Pearson相关分析显示,两种运动方案所获得的FATmax-O_2(r=0.62)、FATmaxHR(R=0.90)呈显著性相关(P<0.05,n=12);Bland-Altman散点图表明,两种测试结果具有较高的一致性。结论:每2 min逐级递增负荷运动和恒定负荷运动方案推算超重/肥胖青年男性FATmax结果,具有较高的一致性;每2 min逐级递增负荷运动方案适于推算超重/肥胖青年男性FATmax水平。
Objective： To verify the validity of maximal fat oxidation intensity（FATmax） by an incremental exercise protocol, and provide a methodological basis for the application of FATmax in sports practice. Methods： 12 overweight/obese（BMI≥ 24 kg/m^2）young men（age： 20.6 ± 1.2 years;height： 177.7 ± 4.9 cm; weight： 86.8 ± 9.2 kg） completed two exercise protocols under the same experimental condition： one was an incremental load exercise with every 2-min increase until exhaustion（ST）, and another one was a set of different intensities（30% O（2max）, 40% O（2max）, 50%O（2max）, 60% O（2max）and 70% O（2max）） constant-load exercise（LT）. During two exercise tests, the gas exchange were collected and analyzed by a Cortex Metamax 3 B gas analyzer. The fat oxidation rates were calculated at different intensities. The maximal fat oxidation rate（MFO） was estimated after smoothing the binomial curve plotting fat oxidation rates against exercise intensities（O2 and HR）.FATmax was exercise intensity corresponding to maximal fat oxidation rate（MFO）. There were 2-days interval between the two exercise tests. The subjects were asked to refrain from strenuous exercise for24 h before test, and drinking alcohol or caffeinated beverages in experimental day. Each subject was fast at least 2 h before test and performed the two exercise protocols at the same time of a day. All tests conducted in a constant temperature and relative humidity laboratory. Results： No significant difference was found in FATmax corresponding to O2（FATmax-O2）, maximal oxygen uptaken percentage（FATmax-% O（2max）） and HR（FATmax-HR） between two exercise protocols（P〈0.05）. The effect sizes were small between two test results（ES0.2）. There were significant correlation in FATmax-O2（r=0.62） and FATmax-HR（r=0.90） between two exercise protocols（P〈0.05,n=12）. The results of the two tests were shown be high consistency by Bland-Altman plots. Conc
作者
张丽萍
章岚
ZHANG Li-ping,ZHANG Lan(Shangdong Sport University, Jinan, 250102, China)
出处
《中国体育科技》
CSSCI
北大核心
2018年第3期87-91,145,共6页
China Sport Science and Technology
基金
国家体育总局全民健身研究领域项目(2015B060)
山东省重点研发计划(2016GSF122009)
关键词
递增负荷运动
恒定负荷运动
最大脂肪氧化率
最大脂肪氧化强度
incremental load exercise
constant load exercise
maximal fat oxidation rate
intensityeliciting maximal fa t oxidation
