Abstract
Tabata training plays an important role in health promotion. Effective monitoring of exercise energy expenditure is an important basis for exercisers to adjust their physical activities to achieve exercise goals. The input of acceleration combined with heart rate data and the application of machine learning algorithm are expected to improve the accuracy of EE prediction. This study is based on acceleration and heart rate to build linear regression and back propagate neural network prediction model of Tabata energy expenditure, and compare the accuracy of the two models. Participants (n = 45; Mean age: 21.04 ± 2.39 years) were randomly assigned to the modeling and validation data set in a 3:1 ratio. Each participant simultaneously wore four accelerometers (dominant hand, non-dominant hand, right hip, right ankle), a heart rate band and a metabolic measurement system to complete Tabata exercise test. After obtaining the test data, the correlation of the variables is calculated and passed to linear regression and back propagate neural network algorithms to predict energy expenditure during exercise and interval period. The validation group was entered into the model to obtain the predicted value and the prediction effect was tested. Bland-Alterman test showed two models fell within the consistency interval. The mean absolute percentage error of back propagate neural network was 12.6%, and linear regression was 14.7%. Using both acceleration and heart rate for estimation of Tabata energy expenditure is effective, and the prediction effect of back propagate neural network algorithm is better than linear regression, which is more suitable for Tabata energy expenditure monitoring.
Highlights
According to the recently published World Wide Survey of Fitness Trends, high-intensity interval training (HIIT) has become increasingly popular modes of physical exercise [1]
In terms of EE prediction algorithm, back propagate neural network (BPNN) is one of the most common used in machine learning algorithms [15], which has been applied and has significantly improved EE prediction performance in some exercises compared with linear regression (LR)
(3) We evaluate and compare the predictive effectiveness of linear regression and back propagate neural network model
Summary
According to the recently published World Wide Survey of Fitness Trends, high-intensity interval training (HIIT) has become increasingly popular modes of physical exercise [1]. The methods that produce the most accurate measurement of EE is direct calorimetry, indirect calorimetry and doubly labeled water [4], one limitation of all three methods is that they are expensive to test, which is not suitable for mass measurement of daily physical activity [5] Both accelerometer and heart rate sensor have long been recognized as the common and cheap wearable devices used for monitoring EE [6, 7]. (2) We established linear regression and back propagate neural network model based on ACC-HR to predict the EE of Tabata training during exercise and intervals.
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