1992 Volume 45 Issue 3 Pages 227-237
A time and motion study was conducted on 142 men having various jobs and 118 male college students during 2 working days and 1 holiday, and obtained 760 valid data, from which energy consumption and the daily activity factor (x) were estimated. Analysis of individual motion time gave average values of relative metabolic rate (RMR) for sitting, standing, walking and running; these values on the working days were 0.34±0.11, 0.80±0.41, 2.34±0.56, and 4.73±1.81, respectively. A simple formula for estimating the value of x was prepared using these averages, and a method for correcting it was devised for a person who showed special activity for more than 60min on that day, as follows: 0.9×sleeping time (min) +1.54×sitting time (min) +2.00×standing time (min) +3.54×walking time (mjn) +Σ [(RMR value for running+1.2) ×running time (min) +correction coefficient×special activity time (min)] =1600 (1+x). The suitability and usefulness of this formula in practice were evidenced by good agreement between the value of x calculated using the formula and the x value obtained from all the data of the time and motion study.
