Dept of Regional and City Planning, University of Oklahoma, Norman, OK, USA.
J Phys Act Health. 2012 Sep;9(7):913-23. doi: 10.1123/jpah.9.7.913. Epub 2011 Oct 4.
Responding to the growing interest in the environmental influences on physical activity, and the concerns about the limitations of self-report data, this study evaluates Global Positioning System (GPS) units for measuring outdoor physical activity.
Four GPS models were selected to test their accuracy related to adherence to an actual route walked, variations based on position of unit on user's body, and variations against a known geodetic point. A qualitative assessment was performed using the following criteria: a) battery life, b) memory capacity, c) initial satellite signal acquisition time, d) ease of data transfer to other programs, e) wearability, f) ease of operation, g) suitability for specific study populations, and h) price.
The Garmin Forerunner provided the most accurate data for data points collected along a known route. Comparisons based on different body placement of units showed some variations. GlobalSat reported battery life of 24 hours, compared with 9-15 hours for the other units. The static test using ANOVA showed that the Garmin Foretrex's data points compared with a geodetic point was significantly more accurate than the other 3 models. GPS units appear promising as a tool to capture objective data on outdoor physical activities.
随着人们对环境对身体活动影响的兴趣日益增加，以及对自我报告数据局限性的关注，本研究评估了全球定位系统 (GPS) 设备在测量户外身体活动方面的应用。
选择了四个 GPS 型号，以测试它们在以下方面的准确性：a）与实际行走路线的依从性；b）根据用户身体上的设备位置的变化；c）与已知大地测量点的变化。使用以下标准进行定性评估：a）电池寿命；b）内存容量；c）初始卫星信号获取时间；d）向其他程序传输数据的容易程度；e）穿戴性；f）操作的简便性；g）适合特定研究人群；h）价格。
Garmin Forerunner 为沿着已知路线收集的数据点提供了最准确的数据。基于设备在不同身体位置的比较显示出一些差异。GlobalSat 报告的电池寿命为 24 小时，而其他三个型号的电池寿命为 9-15 小时。使用 ANOVA 的静态测试表明，Garmin Foretrex 的数据点与大地测量点相比，明显比其他 3 个模型更准确。GPS 设备似乎是一种很有前途的工具，可以用来获取户外身体活动的客观数据。
