Estimated method of the energy consumption in a short time walk

Abstract

The estimated population of people of the lifestyle disease in Japan increasing year by year, and it is said that about 70% of the people are lifestyle diseases now. Amount of daily physical activity is strongly associated with the prevalence of lifestyle disease, and thus maintaining certain revel of physical activity is recommended. Short-duration exercise, mainly walking lasting less than 3 minutes, has been reported to account for over 90% of the daily energy expenditure of healthy adults. However, the estimation formula of energy consumption by the commonly used ACSM metabolic equation can be applied only to the steady motion of 5 minutes or more. Suzuki and colleagues propose a new estimation formula for establishing a method of estimating oxygen consumption of short time exercise, but the evaluation of descending walking is insufficient. Therefore, walking experiments were carried out on 10 healthy people aged 18 to 20 years with a total of 15 conditions using a treadmill and stairs. The oxygen consumption in during exercise and post-exercise was measured using a portable gas analyzer in breath-by-breath mode. The root mean square (RMS) of estimate equations was calculated using Leave-one-out cross validation. The RMS (3.49~ 4.08 ml / kg / min) was close to the metabolism at Sitting rest state (3.5 ml / kg / min). But, with respect to the staircase, the results of the Bland-Altman plot analysis showed a proportional error and some correlation it was confirmed that there was. I review an estimated expression, and it will be necessary to get rid of a proportion error in future.