Department of Physical Therapy, School of Health Professions, University of Alabama at Birmingham, Birmingham, AL, USA.
Graduate Program in Physical Education, Federal University of Triângulo Mineiro, Uberaba, Brazil.
Acta Neurol Scand. 2020 Aug;142(2):145-150. doi: 10.1111/ane.13250. Epub 2020 Apr 22.
To examine the relationship between step-rate and energy expenditure during treadmill walking in persons with PD and then further develop a step-rate cut-point for moderate-to-vigorous physical activity (MVPA) for persons with PD.
The sample consisted of 30 persons with mild-to-moderate PD and 30 controls matched by age and sex. Participants performed a 6-minute bout of over-ground walking at comfortable speed, and then completed three, 6-minute bouts of treadmill walking at 13.4 m/min slower, comfortable, and 13.4 m/min faster than comfortable speeds. The three treadmill speeds were based on the initial over-ground walking speed. The total number of steps per treadmill walking bout was recorded using a hand-tally counter, and energy expenditure was measured using a portable, indirect spirometry system.
The results indicated a strong association between step-rate and energy expenditure for persons with PD (R = .92) and controls (R = .92). The analyses further indicated a steeper slope of the association for persons with PD compared with controls (t(58) = -1.87, P < .05), resulting in a lower step-rate threshold (t(58) = 2.19, P < .05) for persons with PD (80 steps·per minutes) than controls (93 steps·per minutes).
Collectively, these results support the application of this disease-specific step-rate threshold for MVPA among persons with PD. This has important implications for physical activity promotion, prescription, and monitoring using accelerometers and pedometers for persons with PD to manage health and symptoms of PD.
研究帕金森病患者在跑步机上行走时的步速与能量消耗之间的关系，进而为帕金森病患者制定适度到剧烈体力活动（MVPA）的步速切点。
本研究的样本包括 30 名轻度至中度帕金森病患者和 30 名按年龄和性别匹配的对照者。参与者以舒适速度进行 6 分钟的地面行走，然后以比舒适速度慢 13.4 m/min、舒适速度和快 13.4 m/min 的速度完成三次 6 分钟的跑步机行走。这三种跑步机速度基于初始的地面行走速度。使用手动计数器记录每个跑步机行走回合的总步数，使用便携式间接肺活量计系统测量能量消耗。
结果表明，帕金森病患者（R =.92）和对照组（R =.92）的步速与能量消耗之间存在很强的关联。分析进一步表明，与对照组相比，帕金森病患者的关联斜率更陡（t(58) = -1.87，P <.05），导致帕金森病患者的步速阈值（t(58) = 2.19，P <.05）更低（80 步·每分钟），而对照组为93 步·每分钟）。
总之，这些结果支持在帕金森病患者中应用该特定疾病的步速阈值来进行 MVPA。这对于使用加速度计和计步器促进、规定和监测帕金森病患者的身体活动，以管理健康和帕金森病的症状具有重要意义。
