Physical Activity for Health Research Group, University of Strathclyde, Glasgow, UK.
J Sci Med Sport. 2013 May;16(3):217-21. doi: 10.1016/j.jsams.2012.08.008. Epub 2012 Sep 19.
To determine self-selected brisk walking pace in currently inactive adults and investigate the efficacy of rhythmic auditory stimuli to regulate moderate intensity walking.
A single-sample controlled laboratory design.
Currently inactive adults (N=25; 76% female; age=34±13yr) completed a moderate intensity treadmill walking trial, during which cadence and steady-state O2 were measured. Participants then completed a 10-min self-paced "brisk" walk followed by a 10-min moderate-paced walk, prompted by a clip-on metronome matched to the treadmill cadence. Data were analyzed using RM t-test, Cohen's d, Bland-Altman plot, and one-way RM ANOVA.
Mean energy expenditure and cadence during the treadmill trial were 3.88±0.53METs and 114±8stepsmin(-1). During self-paced brisk walking cadence was 124±8stepsmin(-1). Cadence during metronome-paced walking was slower for all participants (114±8stepsmin(-1); p<0.05, d=1.23). From the Bland-Altman plots, 23 participants walked within ±3stepsmin(-1) of the metronome cadence, and the other 2 participants were within ±10stepsmin(-1). There were no significant differences (p>0.05) among the minute-by-minute cadences across the 10min of either condition.
Energy expenditure during 2.7mph treadmill walking was higher than 3 METs. Inactive adults walk at a higher cadence during "brisk" walking, compared to walking at a metronome-guided moderate pace. While the natural walking pace of inactive adults was at an intensity known to produce health benefits, and was maintained for 10min, the use of rhythmic auditory feedback is an effective method for regulating walking at a prescribed intensity in inactive adults.
确定当前不活跃成年人自主选择的轻快步伐，并研究节奏听觉刺激调节中等强度步行的效果。
单样本对照实验室设计。
不活跃成年人（N=25；76%为女性；年龄=34±13 岁）完成了一项中等强度跑步机行走试验，在此期间测量了步频和稳态 O2。然后，参与者完成了 10 分钟的自主“轻快”行走，然后在节拍器的提示下进行 10 分钟的适度步伐行走，节拍器与跑步机步频匹配。使用 RM t 检验、Cohen's d、Bland-Altman 图和单向 RM ANOVA 对数据进行分析。
跑步机试验中的平均能量消耗和步频分别为 3.88±0.53METs 和 114±8stepsmin(-1)。自主轻快行走时的步频为 124±8stepsmin(-1)。所有参与者的节拍器节奏下的步频较慢（114±8stepsmin(-1)；p<0.05，d=1.23）。从 Bland-Altman 图可以看出，23 名参与者的步频与节拍器步频相差±3stepsmin(-1)以内，另外 2 名参与者的步频相差±10stepsmin(-1)以内。在这两种情况下，每分钟的步频都没有显著差异（p>0.05）。
2.7mph 跑步机行走的能量消耗高于 3 METs。与节拍器引导的适度步伐相比，不活跃成年人在“轻快”行走时的步频更高。虽然不活跃成年人的自然行走步频处于已知能产生健康益处的强度范围内，并能维持 10 分钟，但使用节奏听觉反馈是调节不活跃成年人规定强度行走的有效方法。
