Measurement of Energy Expenditure Through Treadmill-based Walking and Self-selected Hallway Walking of College Students - Using Indirect Calorimeter and Accelerometer

Ye-Jin Kim; Cui-Sang Wang; Eun-Kyung Kim

doi:10.5720/kjcn.2016.21.6.520

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Korean J Community Nutr. 2016 Dec;21(6):520-532. Korean. Published online December 31, 2016. https://doi.org/10.5720/kjcn.2016.21.6.520
Copyright © 2016 The Korean Society of Community Nutrition


Measurement of Energy Expenditure Through Treadmill-based Walking and Self-selected Hallway Walking of College Students - Using Indirect Calorimeter and Accelerometer
Ye-Jin Kim, Cui-Sang Wang and Eun-Kyung Kim
Department of Food and Nutrition, Gangneung-Wonju National University, Gangneung, Korea.
Corresponding author: Eun-Kyung Kim. Department of Food and Nutrition, Gangneung-Wonju National University, 7 Jukheon - gil, Gangneung, Gangwon-do, 25457, Koera. Tel: (033) 640-2336, Fax: (033) 640-2330, Email: ekkim@gwnu.ac.kr

Received November 29, 2016; Revised December 16, 2016; Accepted December 19, 2016.
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract
Objectives The objective of this study was to assess energy expenditure and metabolic cost (METs) of walking activities of college students and to compare treadmill based walking with self-selected hallway walking. Methods Thirty subjects (mean age 23.4 ± 1.6 years) completed eight walking activities. Five treadmill walking activities (TW2.4, TW3.2, TW4.0, TW4.8, TW5.6) were followed by three self-selected hallway walking activities, namely, walk as if you were walking and talking with a friend: HWL (leisurely), walk as if you were hurrying across the street at a cross-walk: HWB (brisk) and walk as fast as you can but do not run: HWF (fast) were performed by each subject. Energy expenditure was measured using a portable metabolic system and accelerometers. Results Except for HWF (fast) activity, energy expenditures of all other walking activities measured were higher in male than in female subjects. The lowest energy expenditure and METs were observed in TW2.4 (3.65 ± 0.84 kcal/min and 2.88 ± 0.26 METs in male), HWL (leisurely) (2.85 ± 0.70 kcal/min and 3.20 ± 0.57 METs in female), and the highest rates were observed in HWF (fast) (7.72 ± 2.81 kcal/min, 5.84 ± 1.84 METs in male, 6.65 ± 1.57 kcal/min, 7.13 ± 0.68 METs in female). Regarding the comparison of treadmill-based walking activities and self-selected walking, the energy expenditure of HWL (leisurely) was not significantly different from that of TW2.4. In case of male, no significant difference was observed between energy costs of HWB (brisk), HWF (fast) and TW5.6 activities, whereas in female, energy expenditures during HWB (brisk) and HWF (fast) were significantly different from that of TW5.6. Conclusions In this study, we observed that energy expenditure from self-selected walking activities of college students was comparable with treadmill-based activities at specific speeds. Our results suggested that a practicing leisurely or brisk walking for a minimum of 150 minutes per week by both male and female college students enable them to meet recommendations from the Physical activity guide for Koreans.


Keywords: physical activity; treadmill walking; self-selected walking; energy expenditure

Figures


	Fig. 1 Assessment of predicted METs by accelerometer based on bias Bias : [(predicted METs by accelerometer - measured METs by indirect calorimeter) / measured METs by indirect calorimeter] × 100
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	Fig. 2 Comparison of energy expenditure of treadmill walking and self-selected hallway walking ^*: p < 0.05, Significantly different between walking activities by One way repeated measures ANOVA
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Tables


	Table 1 Descriptions of 8 walking activities
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	Table 2 Anthropometric measurements of subjects
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	Table 3 Energy costs of walking activities measured by indirect calorimeter
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	Table 4 VM (vector magnitude) and METs of walking activities measured by accelerometer
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	Table 5 Comparison of energy expenditure by indirect calorimeter and accelerometer
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	Table 6 Correlation coefficients between energy expenditures measured by indirect calorimeter and accelerometer
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