Preliminary Analysis The Characteristic Of Acceleration And Energy Expenditure By The Upper Limb Motions

Purpose:Indirect calorimetry is measuring the VO2 and hence EE,which is recognized more accuracy.Accelerometers that portable and accurately,can predicted the EE through measure the acceleration,which has been widely applied.So the thesis is dedicated to analyze the characteristics of acceleration and energy expenditure of the upper limb motions, attempting to set up a regression equation between the acceleration and energy expenditure.Methods:Health subjects, aged 20 to 59 complete the designed seven upper motions in sitting position, wearing accelerometer and metamax 3B to respectively measure the acceleration and VO2.Results:The upper limb motions significantly increase VO2.The net increase of VO2 is 105ml/min-223ml/min. Among the designed motions, the lowest net increase of VO2 is elbow flexion/extension(40times/min)and the highest net increase of VO2 is the horizontal abduction/adduction of shoulder(90times/min).The acceleration change varied because of different types and frequency motions. The accelerations at wrists are especially sensitive to the various frequencies. Seven regression equations, between the acceleration and energy expenditure, are set up based on different frequencies and motions(R2=0.475-0.658).There are no significant differences between the measured VO2 and the predited one except the horizontal abduction/adduction of shoulder(60times/min).We will go on questing the characteristics of acceleration by the upper limb motions.Conclusions:The upper limb motions significantly increase VO2. Seven regression equations, between the acceleration and energy expenditure, are set up based on different frequencies and motions(R2=0.475-0.658).There are no significant differences between the measured VO2 and the predited one except the horizontal abduction/ adduction of shoulder(60times/min).