A study on the factors related to energy consumption among residents aged from 40～60 years at different activity states in Nanjing
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摘要:
目的：了解南京市40～60岁成年人不同活动状态下能量消耗的相关因素。方法：招募南京市40～60岁男女性成年人110名，测量其身高、体重，并计算体重指数(body mass index，BMI)与体表面积(body surface area，BSA)，通过双能X线体成分扫描仪获得体成分信息。观察其在能量代谢舱内生活11 h期间，处于平躺、运动、上网、睡眠、静息代谢状态的能量消耗。分析年龄、性别、体重、身高、BMI、体成分等指标对不同活动状态能耗的影响。结果：①男性受试者基础代谢为(2 036.25±226.45)kcal/d，女性受试者基础代谢为(1 673.21±173.37)kcal/d，差异有统计学意义(P＜0.01)；不同年龄段受试者基础代谢相近，差异没有统计学意义(P＞0.05)。去除去脂体重(fat-free mass，FFM)的影响后发现，不同活动状态下女性的能耗高于男性且有统计学意义(P＜0.01)；但不同年龄段受试者能耗差异没有统计学意义(P＞0.05)。②男女受试者不同活动状态的能耗与FFM、体重、BSA、BMI和体脂含量等指标存在显著相关(P＜0.01)。对各相关因素进行多元回归分析后发现，性别、FFM、体脂含量对能耗的影响有统计学意义(P＜0.05)。结论：南京市40～60岁成年人不同活动状态下的能量消耗主要受到FFM和体脂含量的影响。
Abstract:
Objectives：To learn the factors related to energy consumption among residents aged from 40～60 years in Nanjing. Methods：A total of 110 men and women were recruited in Nanjing，their height and body weight were measured，and then body mass index (BMI) and body surface area (BSA) were calculated. The body composition information was recorded according to the dual energy X-ray body scanner. The energy consumption was respectively observed for flat-lying，exercising，internet browsing，sleeping，and rest metabolism during 11 hours they lived in the metabolism chamber. The relationship was analyzed between the energy consumption of different activity states and age，gender，body weight，height，BMI or body composition. Results：①The basal metabolism of male and female subjects was (2 036.25 ± 226.45) kcal/d，(1 673.21 ± 173.37) kcal/d，respectively，the difference was significant (P<0.01)；There were no significant differences in basal metabolism between subjects of different age groups (P>0.05). The energy consumption of women at different activity states was significantly higher than that of male (P<0.01) when energy expenditure (EE)/fat-free mass (FFM)；However，there were no significant differences in energy consumption between subjects at different ages when EE/FFM (P>0.05). ②The energy consumption of male and female subjects was significantly correlated with FFM，body weight，BSA，BMI，and body fat (P<0.01). According to the multiple regression analysis，it was found that the energy consumption under different active states was affected by gender，body fat，and FFM (P<0.05). Conclusion：The energy consumption of different activity states is mainly related to the FFM and body fat among the residents aged from 40～60 years in Nanjing.
