Comparative Study Of Physical Activity And Value Analysis Measuring Instrument

Modern way of living and working bring people great convenience, but at the same time, they do reduce our physical activity. It has been well known that physical activity has a significant impact on our health. Previous research has provided plenty of evidence that the incidence of chronic diseases such as cardiovascular disease, hypertension, type2diabetes and osteoporosis is related to the lack of physical activity. Inadequate physical activity can also lead to a decrease in the level of energy consumption, which cause obesity. Obesity, especially teenagers obesity problem, in the present moment, has attracted widespread attention. Physical activity and energy consumption play an important role in people’s health, so quantitative of physical activity should be take more attation to.Many methods and monitors can be used to evaluate physical activity, however, each owns advantages and disadvantages. Accelerometers have been proved lightweight, non-invasive, reliable, easy operation and low cost is a little bit, and is convenient for people to use in the health management. Actigraph GT3X and Sense Wear Armband are most widely used monitors, and LivePod LP2is a new kind of acceleration sensor. All the three monitors’ accuracy haven’t been evaluated in Chinese group. We compared the validity of these three monitors using indirect calorimentry under laboratory condition. Through statistical analysis of the experimental data, we found that:(1)All three monitors have high realiablity in their measurement;(2)LivePod LP2should be placed close to the center of mass of human body;(3)Compared with LivePod LP2, Actigraph GT3X (Freedson model) and SenseWear Armband have poor validity in predict the energy expenditure of Chinese college students when they walk or run on the treadmill.Based on the above findings, we suggest that Chinese people can choose LivePod LP2as physical activity monitoring instrument, and Livepod LP2should be placed clsed to the body mass center, for example on the waist, to know the energy expenditure.