Higher Fat Oxidation in Running Than Cycling at the Same Exercise Intensities
Higher Fat Oxidation in Running Than Cycling at the Same Exercise Intensities
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DOI：
10.1123/ijsnem.20.1.44
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发表时间：
2010-02-01
影响因子：
2.5
通讯作者：
Bosch, Andrew
中科院分区：
文献类型：
--
作者：
Capostagno, Benoit;Bosch, Andrew
这项研究考察了在相同的相对运动强度下跑步和骑自行车时脂肪和碳水化合物氧化的差异，运动强度有多种确定方法。具体地说，运动强度用最大工作量百分比(WL(Max))、最大摄氧量(%VO(2max))、最大心率(%HR(Max))和感知疲劳等级(RPE)来表示。10名男子铁人三项运动员进行了最大限度的跑步和自行车试验，随后分别以60%、65%、70%、75%和80%的WL(Max)进行锻炼。在所有次极量试验中测量VO(2)、HR、RPE和血浆乳酸浓度。根据VO(2)和VCO(2)数据计算脂肪和碳水化合物的氧化。重复测量的双因素方差分析被用来确定不同锻炼方式之间是否存在统计学上的显著差异。在以%WL(Max)或%VO(2max)表示的相同相对强度下，跑步时的脂肪氧化显著高于自行车。两种运动模式之间的VO(2max)和HR(Max)无显著差异，相同%WLmax时两种运动模式之间的次极值VO2和RPE也无显著差异。然而，当分别以60%、65%和65%-80%WL(Max)循环时，心率和血浆乳酸浓度显著高于对照组。总而言之，在以%WL(Max)或%VO(2max)表示的相同相对强度下，跑步期间的脂肪氧化显著高于自行车。
This study examined the differences in fat and carbohydrate oxidation during running and cycling at the same relative exercise intensities, with intensity determined in a number of ways. Specifically, exercise intensity was expressed as a percentage of maximum workload (WL(max)), maximum oxygen uptake (%VO(2max)), and maximum heart rate (%HR(max)) and as rating of perceived exertion (RPE). Ten male triathletes performed maximal running and cycling trials and subsequently exercised at 60%, 65%, 70%, 75%, and 80% of their WL(max). VO(2), HR, RPE, and plasma lactate concentrations were measured during all submaximal trials. Fat and carbohydrate oxidation were calculated from VO(2) and VCO(2) data. A 2-way ANOVA for repeated measures was used to determine any statistically significant differences between exercise modes. Fat oxidation was shown to be significantly higher in running than in cycling at the same relative intensities expressed as either %WL(max) or %VO(2max). Neither were there any significant differences in VO(2max) and HR(max) between the 2 exercise modes, nor in submaximal VO2 or RPE between the exercise modes at the same %WLmax. However, heart rate and plasma lactate concentrations were significantly higher when cycling at 60% and 65% and 65-80%WL(max), respectively. In conclusion, fat oxidation is significantly higher during running than during cycling at the same relative intensity expressed as either %WL(max) or %VO(2max).