Smart Foods Centre, University of Wollongong, Wollongong, Australia.
J Phys Act Health. 2011 Jul;8(5):675-81. doi: 10.1123/jpah.8.5.675.
Knowing the total energy expenditure (TEE) of overweight adults is important for prescribing weight loss interventions. However, objective measurements of TEE may not always be readily available and can be expensive. This study aimed to investigate the validity of RT3 accelerometers in predicting the TEE of sedentary overweight adults, and to identify any sensitivity to anthropometric changes.
The analysis used data from a 12-week weight loss study. At baseline and 12-week, TEE was predicted using RT3 accelerometers during whole room calorimeter stays. Bias between 2 methods was compared at and between the baseline and 12-week measurement points. Multiple regression analyses of TEE data were conducted.
Predicted and measured values for TEE were not different at baseline (P = .677) but were significantly different after weight loss (P = .007). However, the mean bias between methods was small (<100 kcal/d) and was not significantly different between 2 time-points. RT3 activity counts explained an additional 2% of the variation in TEE at 12-week but not at baseline.
RT3 accelerometers are not sensitive to body composition changes and do not explain variation in TEE of overweight and obese individuals in a sedentary environment.
了解超重成年人的总能量消耗（TEE）对于制定减肥干预措施非常重要。然而，TEE 的客观测量并不总是现成的，而且可能很昂贵。本研究旨在探讨 RT3 加速度计预测久坐超重成年人 TEE 的有效性，并确定其对人体测量变化的敏感性。
该分析使用了为期 12 周的减肥研究的数据。在基线和 12 周时，使用 RT3 加速度计在整个房间热量计停留期间预测 TEE。在基线和 12 周测量点比较了两种方法之间的偏差。对 TEE 数据进行了多元回归分析。
基线时 TEE 的预测值和实测值没有差异（P =.677），但减肥后差异显著（P =.007）。然而，两种方法之间的平均偏差较小（<100 千卡/天），且在两个时间点之间没有显著差异。RT3 活动计数在 12 周时额外解释了 TEE 变化的 2%，但在基线时没有。
RT3 加速度计对身体成分变化不敏感，也不能解释久坐环境中超重和肥胖个体 TEE 的变化。
