What Is Activity Duration?

Active time recording is the most commonly used method to understand energy expenditure. It records the duration of various activities for each person in a day, and then calculates the energy consumption of the whole day according to the energy consumption rate of each activity. The energy consumption rate of various activities can be measured by others or measured by direct measurement. The advantage of this method is that existing measurement data can be used without expensive instruments and high analytical techniques, but there are many factors that affect the measurement results. It is difficult to record the accuracy of extra-vocational activities and the results are not accurate.