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KMID : 1101720220260010008
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Physical Activity and Nutrition
2022 Volume.26 No. 1 p.8 ~ p.13
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Comparison of energy expenditure and substrate oxidation between walking and running in men and women
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Makino Akitoshi
Yamaguchi Keiichi
Sumi Daichi
Ichikawa Masaru
Ohno Masumi
Goto Kazushige
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Abstract
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Purpose: The present study compared energy metabolism between walking and running at equivalent speeds during two incremental exercise tests.
Methods: 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.
Results: 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).
Conclusion: 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.
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KEYWORD
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fast walking, running, energy expenditure, carbohydrate oxidation, fat oxidation
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