Physical Activity for Health Research Group, University of Strathclyde, Glasgow, United Kingdom.
J Phys Act Health. 2014 Feb;11(2):320-9. doi: 10.1123/jpah.2012-0056. Epub 2013 Jan 30.
Walking cadence has shown promise for estimating walking intensity in healthy adults. Auditory cues have been shown to improve gait symmetry in populations with movement disorders. We investigated the walking cadence-energy expenditure relationship in unilateral transtibial amputees (TTAs), and the potential of music cues for regulating walking cadence and improving gait symmetry.
Seventeen unilateral TTAs performed 2 5-min treadmill walking trials, followed by 2 5-min overground walking trials (self-regulated "brisk" intensity, and while attempting to match a moderate-tempo digital music cue).
Walking cadence significantly (P < .001) and accurately (R(2) = .55, SEE = 0.50 METs) predicted energy expenditure, and a cadence of 86 steps·min(-1) was equivalent to a 3-MET intensity. Although most participants were able to match cadence to prescribed music tempo, gait symmetry was not improved during the music-guided condition, compared with the self-regulated condition.
This is the first study to investigate the utility of walking cadence for monitoring and regulating walking intensity in adults with lower limb prosthesis. Cadence has similar or superior accuracy as an indicator of walking intensity in this population, compared with the general population, and adults with a unilateral TTA are capable of walking at moderate intensity and above for meaningful bouts of time.
步频已被证明可用于估计健康成年人的步行强度。听觉提示已被证明可改善运动障碍人群的步态对称性。我们研究了单侧胫骨截肢者（TTAs）的步行步频与能量消耗之间的关系，以及音乐提示调节步行步频和改善步态对称性的潜力。
17 名单侧 TTAs 进行了 2 次 5 分钟的跑步机步行试验，随后进行了 2 次 5 分钟的地面步行试验（自我调节的“轻快”强度，同时尝试匹配中等节奏的数字音乐提示）。
步行步频显著（P <.001）且准确（R(2) =.55，SEE = 0.50 METs）地预测能量消耗，86 步·min(-1)的步频相当于 3-MET 强度。尽管大多数参与者能够将步频与规定的音乐节奏匹配，但与自我调节条件相比，在音乐引导条件下步态对称性并没有得到改善。
这是第一项研究单侧下肢假体患者使用步行步频监测和调节步行强度的研究。与一般人群相比，在该人群中，步频作为步行强度的指示符具有相似或更高的准确性，并且单侧 TTA 患者能够以中等强度或更高强度进行有意义的长时间行走。
