Department of Medicine, Kantonsspital Baden, Switzerland.
Eur J Intern Med. 2009 Oct;20(6):622-4. doi: 10.1016/j.ejim.2009.06.007. Epub 2009 Aug 6.
Non-exercise physical activity thermogenesis (NEAT) has been shown to differ in obese and non-obese subjects.
To explore whether NEAT is determined by the body mass index (BMI) even within the normal range, we hypothesized that the daily walking distance of young doctors in training at a teaching hospital is inversely correlated with the BMI.
Prospective, single blind, controlled trial.
Identical wards of a 400 bed university-based teaching hospital, highly standardized for patient number treated, the severity of disease, the clinical experience of the doctors and their time spent in the institution.
The walking distance was measured daily by a pedometer over one week and standardized for the setting, workload, and insurance status.
Mean daily walking distance as a measure of NEAT.
The mean daily distance walked was 2323+/-627 m with a more than 4-fold difference between the daily maximum of 4310 m and the minimum of 1003 m. There was an inverse correlation of the walking distance with the BMI (Spearman rho=0.750, p=0.02), and with the time spent in the hospital (rho=-0.800, p=0.01), but not with the months of clinical experience, age, gender, number of patients, disease, severity nor with the insurance status of the patients cared for. There was no mean difference between the distance walked in the morning vs. in the afternoon nor was there a trend from Monday through Friday.
The results of this pilot study indicate that NEAT is related to the BMI in the non-obese stage.
非运动活动产热（NEAT）已被证明在肥胖和非肥胖受试者中存在差异。
为了探索 NEAT 是否即使在正常范围内也受体重指数（BMI）的影响，我们假设在教学医院接受培训的年轻医生的日常步行距离与 BMI 呈负相关。
前瞻性、单盲、对照试验。
一所拥有 400 张床位的大学教学医院的相同病房，高度标准化，包括治疗的患者数量、疾病的严重程度、医生的临床经验以及他们在医院的时间。
一周内通过计步器每天测量步行距离，并根据环境、工作量和保险状况进行标准化。
作为 NEAT 衡量标准的平均每日步行距离。
平均每日步行距离为 2323±627m，最高每日 4310m 与最低每日 1003m 之间相差超过 4 倍。步行距离与 BMI（Spearman rho=0.750，p=0.02）和在医院的时间（rho=-0.800，p=0.01）呈负相关，但与临床经验月数、年龄、性别、患者数量、疾病、严重程度或所照顾患者的保险状况无关。早上和下午的步行距离没有差异，从周一到周五也没有趋势。
这项初步研究的结果表明，NEAT 与非肥胖阶段的 BMI 有关。
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