Lee C Ellen, Simmonds Maureen J, Etnyre Bruce R, Morris G Stephen
West Virginia University, Morgantown, WV 26506-9226, USA.
Spine (Phila Pa 1976). 2007 May 20;32(12):1329-36. doi: 10.1097/BRS.0b013e318059af3b.
In a cross-sectional study, vertical ground reaction force (GRF) during 2 speeds of walking were compared between 3 age- and sex-matched groups: back pain only (BPO) group, back pain with referred leg pain (LGP) group, and a control group.
The purpose was to evaluate the influence of pain distribution on vertical GRF of patients with low back problems during 2 walking speed conditions: preferred and fastest speeds.
People with low back pain often have difficulty walking. A better understanding of how pain distribution differentially affects walking will facilitate clinicians' assessment and enhance treatment in patients with low back pain problems.
All participants walked on a 7.62-m walkway. Vertical GRF parameters were recorded during stance phase using a force platform for each walking speed condition. Multivariate analysis of covariance was used for statistical analysis, with gait velocity as the covariate.
The BPO and control groups did not differ significantly in vertical GRF during both walking speed conditions (P > or = 0.11). All vertical GRF parameters of the LGP group, except the peak loading force (P = 0.374), were significantly less than those of the control group during preferred walking speed condition (P < or = 0.008). However, there was no significant difference in the vertical GRF components between LGP and control groups during the fastest walking speed condition (P > or = 0.07).
Pain distribution of people with low back problems differentially influences the vertical GRF they experience during walking. When walking at preferred speed, those with referred leg pain seem to use additional strategies besides walking slowly to attenuate the amount of force imposed on their painful leg. When challenged to walk at their fastest speed, people with back pain only walk as fast and withstand comparable amount of force as their pain-free counterparts.
在一项横断面研究中，比较了3个年龄和性别匹配组在两种步行速度下的垂直地面反作用力（GRF）：仅背痛（BPO）组、伴有腿部牵涉痛（LGP）的背痛组和对照组。
目的是评估在两种步行速度条件下（偏好速度和最快速度），疼痛分布对腰背部问题患者垂直GRF的影响。
腰背痛患者通常行走困难。更好地理解疼痛分布如何不同地影响行走，将有助于临床医生对腰背痛问题患者的评估并加强治疗。
所有参与者在一条7.62米的通道上行走。在每个步行速度条件下，使用测力平台在站立期记录垂直GRF参数。采用多变量协方差分析进行统计分析，将步态速度作为协变量。
在两种步行速度条件下，BPO组和对照组的垂直GRF无显著差异（P≥0.11）。在偏好步行速度条件下，LGP组的所有垂直GRF参数，除峰值加载力外（P = 0.374），均显著低于对照组（P≤0.008）。然而，在最快步行速度条件下，LGP组和对照组的垂直GRF分量无显著差异（P≥0.07）。
腰背部问题患者的疼痛分布对其行走过程中所经历的垂直GRF有不同影响。当以偏好速度行走时，伴有腿部牵涉痛的患者似乎除了走得慢之外，还会采用其他策略来减轻施加在疼痛腿部的力量。当被要求以最快速度行走时，仅背痛的患者能走得和无疼痛的同龄人一样快，并承受相当的力量。
