Movement Analysis Laboratory, Istituto Ortopedico Rizzoli, University of Bologna, Italy.
J Neuroeng Rehabil. 2009 Dec 30;6:47. doi: 10.1186/1743-0003-6-47.
Obesity is a major problem especially in western countries and several studies underline the importance of physical activity to enhance diet. Currently there is increasing interest in instruments for monitoring daily physical activity. The purpose of this pilot study was to appraise the qualitative and quantitative differences in physical activities and gait analysis parameters in control and obese subjects by means of an innovative tool for the monitoring of physical activity.
Twenty-six obese patients, 16 women and 10 men, aged 22 to 69 years with Body Mass Index (BMI) between 30 and 51.4 kg/m2, were compared with 15 control subjects, 4 men and 11 women, aged 24 to 69 with BMI between 18 and 25 kg/m2 during daily physical activities. The IDEEA device (Minisun, Fresno, CA), based on a wearable system of biaxial accelerometers and able to continuously record the physical activities and energy expenditure of a subject in time was used. Time spent in different physical activities such as standing, sitting, walking, lying, reclining, stepping, energy expenditure and gait parameters (velocity, stance duration, etc) were measured during a 24-hours period.
A trend toward a reduced number of steps was present, associated to reduced speed, reduced cadence and reduced rate of single and double limb support (SLS/DLS). Moreover, obese people spent significant less time stepping, less time lying and more time in a sitting or reclined position during the night. The energy expenditure during a 24-hours period was higher in the obese compared to controls.
The study provided objective parameters to differentiate the daily motor activity of obese subjects with respect to controls, even a larger population is required to confirm these findings. The device used can be of support in programming educational activities for life style modification in obese people as well as for monitoring the results of various kinds of intervention in these patients concerning weight and physical performance.
肥胖是一个主要问题，尤其是在西方国家，有几项研究强调了体力活动对于促进饮食的重要性。目前，人们对监测日常体力活动的仪器越来越感兴趣。这项初步研究的目的是评估通过监测体力活动的创新工具，肥胖患者与对照者之间体力活动和步态分析参数的定性和定量差异。
26 名肥胖患者（16 名女性，10 名男性，年龄 22 至 69 岁，体重指数[BMI]在 30 至 51.4kg/m2 之间）与 15 名对照者（4 名男性，11 名女性，年龄 24 至 69 岁，BMI 在 18 至 25kg/m2 之间）进行比较。使用基于双轴加速度计的可穿戴系统 IDEEA 设备（Minisun，加利福尼亚州弗雷斯诺）连续记录受试者的体力活动和能量消耗。在 24 小时期间测量不同体力活动（如站立、坐着、行走、躺着、斜倚、踏步、能量消耗和步态参数（速度、站立持续时间等））所花费的时间。
存在着步数减少的趋势，伴随着速度降低、步频降低、单肢和双肢支撑的比例降低（SLS/DLS）。此外，肥胖者夜间踏步时间显著减少，躺着时间增加，坐着或斜倚时间增加。24 小时期间的能量消耗在肥胖者中高于对照组。
该研究提供了区分肥胖患者与对照组日常运动活动的客观参数，需要更大的人群来证实这些发现。所使用的设备可以支持为肥胖者制定生活方式改变的教育活动计划，也可以监测各种干预措施对这些患者体重和身体表现的结果。
