The formula for calculating the predicted value of cardiorespiratory endurance using a foot rest-based cardiorespiratory exercise device

This study developed a formula for calculating the predicted VO(2) max value using a prototype model of foot-based cardiorespiratory exercise. Forty sedentary workers (20 men and 20 women) were enrolled via consecutive sampling. They underwent direct measurement of VO(2) max using spiroergometry as the gold standard; the predicted VO(2) max value was calculated using a prototype model of foot-based cardiorespiratory exercise, which was performed on consecutive days. Multivariate linear regression analysis was used to formulate the equation for the predicted VO(2) max value by including potential contributing variables: gender, body height, body weight and heart rate. Bland–Altman test was used for assessing the agreement level for the predicted VO(2) max value. The equation for the predicted VO(2) max value was formulated as 3.2 + 0.15 optimal exercise heart rate −5.5 sexes (0 for men, 1 for women). The agreement level for the formula was acceptable in all measurement result ranges. The formula developed in this study can be used to measure the predicted VO(2) max value with an acceptable agreement level.