Makino Akitoshi, Yamaguchi Keiichi, Sumi Daichi, Ichikawa Masaru, Ohno Masumi, Goto Kazushige
Graduate School of Sport and Health Science, Ritsumeikan University, Shiga, Japan.
Research Fellow of Japan Society for the Promotion of Science, Chiyodaku, Japan.
Phys Act Nutr. 2022 Mar;26(1):8-13. doi: 10.20463/pan.2022.0002. Epub 2022 Mar 31.
The present study compared energy metabolism between walking and running at equivalent speeds during two incremental exercise tests.
Thirty four university students (18 males, 16 females) were recruited. Each participant completed two trials, consisting of walking (Walk) and running (Run) trials on different days, with 2-3 days apart. Exercise on a treadmill was started from initial stage of 3 min (3.0 k/m in Walk trial, 5.0 km/h in Run trial), and the speed for walking and running was progressively every minute by 0.5 km/h. The changes in metabolic variables, heart rate (HR), and rating of perceived exertion (RPE) during exercise were compared between the trials.
Energy expenditure (EE) increased with speed in each trial. However, the Walk trial had a significantly higher EE than the Run trial at speeds exceeding 92 ± 2 % of the maximal walking speed (MWS, p < 0.01). Similarly, carbohydrate (CHO) oxidation was significantly higher in the Walk trial than in the Run trial at above 92 ± 2 %MWS in males (p < 0.001) and above 93 ± 1 %MWS in females (p < 0.05).
These findings suggest that EE and CHO oxidation during walking increase non-linearly with speed, and walking at a fast speed causes greater metabolic responses than running at the equivalent speed in young participants.
本研究比较了在两项递增运动测试中，相同速度下行走和跑步时的能量代谢情况。
招募了34名大学生（18名男性，16名女性）。每位参与者完成两项测试，分别为在不同日期进行的行走（Walk）和跑步（Run）测试，间隔2至3天。跑步机运动从初始的3分钟开始（行走测试中为3.0千米/小时，跑步测试中为5.0千米/小时），行走和跑步速度每分钟递增0.5千米/小时。比较两项测试中运动期间代谢变量、心率（HR）和主观用力程度分级（RPE）的变化。
在每项测试中，能量消耗（EE）均随速度增加。然而，在速度超过最大行走速度（MWS）的92±2%时，行走测试的EE显著高于跑步测试（p<0.01）。同样，在男性中，当速度高于92±2%MWS时，行走测试中的碳水化合物（CHO）氧化显著高于跑步测试（p<0.001）；在女性中，当速度高于93±1%MWS时，情况也是如此（p<0.05）。
这些发现表明，行走过程中的EE和CHO氧化随速度呈非线性增加，并且在年轻参与者中，快速行走比相同速度跑步会引起更大的代谢反应。
