| Objective: to evaluate the accuracy of 8 currently popular formulas for calculating resting energy consumption in predicting resting energy consumption of young people aged 18-29 in China.Secondly,the energy consumption characteristics of intermittent sit-ins were explored to provide reasonable intervention strategies for sit-ins.Methods: 33 non-professional sports in sichuan normal university students as subjects,in the morning on an empty stomach condition wear K4b2 equipment complete resting metabolic energy consumption of 20 minutes and 10 minutes to sit,stand,stand by alternately,walking activity energy consumption measurement,stand by alternation every minute time,continuous walking on the treadmill walking with 2 km/h speed for 1 minute,then sit for nine minutes.Results: the prediction accuracy of the formula was as follows: the overall prediction accuracy of HB formula was 60.6%,that of WHO was 54.4%,and the prediction accuracy of other formulas was less than 50%.The prediction accuracy of HB formula for normal weight male individuals was 65.5%,WHO 63.7%,Mifflin 50.9%,and the rest were lower than 50%.The prediction accuracy HB of normal weight female was 61.5%,and the rest was lower than 50%.The prediction accuracy of HB formula for overweight male individuals was 55%,WHO was 55%,and the rest was less than 50%.The prediction accuracy of overweight women was lower than 50%,and the highest HB was 45%.According to the difference analysis,there was no difference between the predicted value of UK formula and K4b2(P>0.05),while the estimated value of other formulas showed significant difference from the measured value(P<0.01).There was no difference between the predicted value of BMI group UK and the test value of K4b2(P>0.05),while the rest showed significant difference(P<0.01).There were significant differences between the predicted values of all the formulas and the test values of K4b2 in the male and female groups(P<0.01).According to the consistency test between the formula and K4b2,the average difference values of Mifflin,HB,Owen,WHO,Liu,UK,Wang and Nelson formulas are 220,121.5,325.4,141.9,209.9,-2.2,336.3,and 378.6,respectively.Points outside the consistency interval account for 3%,3.6%,4.2%,3%,4.8%,1.8%,3.6%,and 3.6%,respectively.In addition,the predicted bias of the formula is in direct or inverse relationship with lean body weight.Analysis of energy consumption difference between activities showed that sitting,standing,sitting and walking in METs,VO2ml/kg/min,and EE were significantly different from each other(P<0.05),and there was no difference in respiratory quotient(P>0.05).There were significant differences in energy consumption indexes between normal weight and overweight activities(P<0.01).When standing,EEkcal/kg/min,Vo2ml/kg/min and Vo2ml/kg/min increased by 15.2%,15.1%,8.3% and 7.5%,respectively,in the male normal weight group.The women in the normal weight group increased by 9.6%,9.4%,15.8% and 15.9%,respectively.In the alternation of standing and sitting,the normal weight group of men increased by 31.8%,31.7%,24.1% and 23.6%,respectively,while the normal weight group of women increased by 27%,27.3%,28.6% and 29%,respectively.During intermittent walking,the normal weight group of men increased by 48.7%,52%,30.8% and 36.6%,respectively,and the normal weight group of women increased by 31.8%,34.9%,42% and 47%,respectively.METs in the first 5 minutes of walking is 1.95 times as great as sitting.The 10-minute average was 1.5 times higher than the sit-in,and it took longer for normal body weight energy consumption to fall back to baseline energy consumption than the overshoot.Conclusion: the accurate estimation of resting energy metabolism in the formula is not optimistic,and gender and obesity influence the prediction accuracy of the formula.From the perspective of energy consumption,both standing and sitting alternation and standing are not an efficient intervention strategy for sedentary behavior.Short and frequent distance movement projects are an ideal intervention strategy for sedentary behavior. |
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