Department of Sports Medicine, Institute of Exercise and Health Sciences, University of Basel, Switzerland.
Int J Sports Med. 2010 Mar;31(3):186-91. doi: 10.1055/s-0029-1243641. Epub 2010 Feb 17.
This study assesses the accuracy of the Omron HJ-720ITC pedometer at low walking intensities in patients with chronic heart failure. Step accuracy was assessed by visual observation on the treadmill and during free walking at 40, 50, 60, 70, 80 m/min, as well as during self paced walking using the 6 min walk test. A total of ninety-seven patients with heart failure (mean age: 61+/-13, NYHA I, N=30; NYHA II, N=32; NYHA III, N=35) participated in the study. At predefined walking speeds, a statistically significant % error in pedometer accuracy was evident at 60 m/min (p=0.039), and% error increased markedly below this threshold. Highest% error in pedometer accuracy was seen at 40 m/min (mean bias (% error): 28.3+/-9.0%; 95% CI: 21.8-34.7; p<0.001). During self paced walking (6MWT) the absolute% error in pedometer readings was largest in patients with strongest functional limitations and 6 MWT distances <400 m (mean bias (% error): 10.7+/-13.6%; CI 5.6-15.4, p<0.001). The Omron HJ-720ITC pedometer is accurate for monitoring activity in individuals with normal walking behaviour, but seems unsuitable for chronically ill patients characterised by slow walking gaits.
这项研究评估了 Omron HJ-720ITC 计步器在慢性心力衰竭患者低行走强度下的准确性。通过在跑步机上和以 40、50、60、70、80 m/min 的速度自由行走以及使用 6 分钟步行试验进行自我 paced 行走时的目视观察来评估步频准确性。共有 97 名心力衰竭患者（平均年龄：61+/-13，NYHA I，N=30；NYHA II，N=32；NYHA III，N=35）参加了这项研究。在预设的行走速度下，计步器准确性的统计学显着%误差在 60 m/min 时明显（p=0.039），并且低于此阈值时，%误差显着增加。计步器准确性的最高%误差出现在 40 m/min（平均偏差（%误差）：28.3+/-9.0%；95%置信区间：21.8-34.7；p<0.001）。在自我 paced 行走（6MWT）中，在功能限制最强且 6MWT 距离<400 m 的患者中，计步器读数的绝对%误差最大（平均偏差（%误差）：10.7+/-13.6%；CI 5.6-15.4，p<0.001）。Omron HJ-720ITC 计步器可准确监测正常行走行为的个体的活动，但似乎不适合以缓慢行走步态为特征的慢性疾病患者。
