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J Sci Med Sport. 2014 Jan;17(1):96-101. doi: 10.1016/j.jsams.2013.02.004. Epub 2013 Mar 15.

The development of an estimation model for energy expenditure during water walking by acceleration and walking speed.

Author information

1
Education Center, Chiba Institute of Technology, Japan. Electronic address: kkaneda@sea.it-chiba.ac.jp.
2
Graduate School of Media and Governance, Keio University, Japan.
3
Division of Integrated Sciences, J. F. Oberlin University, Japan.
4
Faculty of Science, Health and Education, University of the Sunshine Coast, Australia.

Abstract

OBJECTIVES:

The aim of this study was to develop an estimation equation for energy expenditure during water walking based on the acceleration and walking speed.

DESIGN:

Cross-validation study.

METHODS:

Fifty participants, males (n=29, age: 27-73) and females (n=21, age: 33-70) volunteered for this study. Based on their physical condition water walking was conducted at three self-selected walking speeds from a range of: 20, 25, 30, 35 and 40 m/min. Energy expenditure during each trial was calculated. During water walking, an accelerometer was attached to the occipital region and recorded three-dimensional accelerations at 100 Hz. A stopwatch was used for timing the participant's walking speed. The estimation model for energy expenditure included three components; (i) resting metabolic rate, (ii) internal energy expenditure for moving participants' body, and (iii) external energy expenditure due to water drag force.

RESULTS:

When comparing the measured and estimated energy expenditure with the acceleration data being the third component of the estimation model, high correlation coefficients were found in both male (r=0.73) and female (r=0.77) groups. When walking speeds were applied to the third component of the model, higher correlation coefficients were found (r=0.82 in male and r=0.88 in female). Good agreements of the developed estimation model were found in both methods, regardless of gender.

CONCLUSIONS:

This study developed a valid estimation model for energy expenditure during water walking by using head acceleration and walking speed.

KEYWORDS:

External energy expenditure; Internal energy expenditure; Power dimension; Resting metabolic rate; Third-ordered equation

PMID:
23499496
DOI:
10.1016/j.jsams.2013.02.004
[Indexed for MEDLINE]
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