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Open AccessArticle

Simple Prediction of Metabolic Equivalents of Daily Activities Using Heart Rate Monitor without Calibration of Individuals

1
Department of Food and Nutritional Science, Ochanomizu University, Tokyo 112-8610, Japan
2
Department of Nutrition and Metabolism, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition, Tokyo 162-8636, Japan
3
Graduate School of Engineering Science, Osaka University, Osaka 560-8531, Japan
4
Faculty of Sport Sciences, Waseda University, Saitama 359-1192, Japan
5
Omron Healthcare Co., Ltd., Kyoto 617-0002, Japan
*
Authors to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2020, 17(1), 216; https://doi.org/10.3390/ijerph17010216
Received: 16 November 2019 / Revised: 18 December 2019 / Accepted: 19 December 2019 / Published: 27 December 2019
(This article belongs to the Special Issue Effects of Exercise on Health-related Markers and Bioenergetics)
Background: Heart rate (HR) during physical activity is strongly affected by the level of physical fitness. Therefore, to assess the effects of fitness, we developed predictive equations to estimate the metabolic equivalent (MET) of daily activities, which includes low intensity activities, by % HR reserve (%HRR), resting HR, and multiple physical characteristics. Methods: Forty volunteers between the ages of 21 and 55 performed 20 types of daily activities while recording HR and sampling expired gas to evaluate METs values. Multiple regression analysis was performed to develop prediction models of METs with seven potential predictors, such as %HRR, resting HR, and sex. The contributing parameters were selected based on the brute force method. Additionally, leave-one-out method was performed to validate the prediction models. Results: %HRR, resting HR, sex, and height were selected as the independent variables. %HRR showed the highest contribution in the model, while the other variables exhibited small variances. METs were estimated within a 17.3% difference for each activity, with large differences in document arrangement while sitting (+17%), ascending stairs (−8%), and descending stairs (+8%). Conclusions: The results showed that %HRR is a strong predictor for estimating the METs of daily activities. Resting HR and other variables were mild contributors. (201 words) View Full-Text
Keywords: physical activity intensity; physical fitness; %heart rate reserve; resting heart rate; leave-one-out method physical activity intensity; physical fitness; %heart rate reserve; resting heart rate; leave-one-out method
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Caballero, Y.; Ando, T.J.; Nakae, S.; Usui, C.; Aoyama, T.; Nakanishi, M.; Nagayoshi, S.; Fujiwara, Y.; Tanaka, S. Simple Prediction of Metabolic Equivalents of Daily Activities Using Heart Rate Monitor without Calibration of Individuals. Int. J. Environ. Res. Public Health 2020, 17, 216.

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