Elsworth Charlotte, Dawes Helen, Winward Charlotte, Howells Ken, Collett Johnny, Dennis Andrea, Sackley Catherine, Wade Derick
School of Life Sciences, Oxford Brookes University, Oxford, UK.
Clin Rehabil. 2009 Feb;23(2):171-5. doi: 10.1177/0269215508098895.
To examine the accuracy of measuring step counts using a pedometer in participants with neurological conditions and healthy volunteers in relation to a manual step count tally.
Oxford Centre for Enablement, Nuffield Orthopaedic Centre NHS Trust, Oxford, UK.
Healthy adults (n = 13, age: mean 29, SD = 12) and adults with neurological conditions (n=20 stroke, n=16 multiple sclerosis, n=5 muscular dystrophy, n=1 spinal cord injury, n=1 traumatic brain injury; age: mean 54, SD=13).
Individuals walked for 2 minutes at self-selected walking speeds (SSWS) wearing a pedometer. Healthy individuals were then asked to walk at slow walking speeds (SWS). Step counts were recorded manually and using a pedometer.
In healthy individuals there was no difference between manually measured and pedometer counts during walking (P>0.05). In adults with neurological conditions the pedometers undercounted (P = 0.003); bias (random error): 27 (111); percentage variability 30% and intraclass correlation coefficient (ICC) 0.66. In neurological adults, from regression analysis the relationship between error and walking speed was cubic, with walking speed accounting for 29% of pedometer error. Healthy individuals showed greater variability and undercounting at SWS bias (random error): 10 (31), percentage variability 8% and ICC 0.73, compared with SSWS bias (random error): -3 (13), percentage variability 3% and ICC 0.84.
Pedometers may undercount when used for people with neurological conditions. There may be variability in pedometer accuracy but this was not strongly related to walking speed. The suitability of pedometer use for exercise monitoring should be individually determined.
研究在患有神经系统疾病的参与者和健康志愿者中，使用计步器测量步数相对于手动计数步数的准确性。
英国牛津纳菲尔德骨科中心国民保健服务信托基金牛津赋能中心。
健康成年人（n = 13，年龄：平均29岁，标准差 = 12）以及患有神经系统疾病的成年人（n = 20例中风、n = 16例多发性硬化症、n = 5例肌肉萎缩症、n = 1例脊髓损伤、n = 1例创伤性脑损伤；年龄：平均54岁，标准差 = 13）。
参与者佩戴计步器以自我选择的步行速度（SSWS）行走2分钟。然后要求健康个体以慢步行走速度（SWS）行走。手动记录步数并使用计步器记录步数。
在健康个体中，行走期间手动测量的步数与计步器计数之间无差异（P>0.05）。在患有神经系统疾病的成年人中，计步器计数偏低（P = 0.003）；偏差（随机误差）：27（111）；变异百分比30%，组内相关系数（ICC）0.66。在患有神经系统疾病的成年人中，回归分析显示误差与步行速度之间的关系为三次方关系，步行速度占计步器误差的29%。与自我选择的步行速度（SSWS）时的偏差（随机误差）：-3（13）、变异百分比3%、ICC 0.84相比，健康个体在慢步行走速度（SWS）时显示出更大的变异性和计数偏低，偏差（随机误差）：10（31）、变异百分比8%、ICC 0.73。
计步器用于患有神经系统疾病的人时可能会计数偏低。计步器准确性可能存在变异性，但这与步行速度没有密切关系。计步器用于运动监测的适用性应因人而异。
