Barboza Taise Vieira, Weizemann Carolina, Carvalho Alberito Rodrigo de
Integrative Biodynamics Evaluation Laboratory, Western Paraná State University (Universidade Estadual do Oeste do Paraná - UNIOESTE), Cascavel, PR, Brazil.
Integrative Biodynamics Evaluation Laboratory, Western Paraná State University (Universidade Estadual do Oeste do Paraná - UNIOESTE), Cascavel, PR, Brazil.
Gait Posture. 2021 Oct;90:320-325. doi: 10.1016/j.gaitpost.2021.09.191. Epub 2021 Sep 21.
Walking speed is a functional vital sign affecting mechanical parameters individually. Further, there is a tendency for pathological gait to occur at slower speeds, which does not always allow for an adequate comparison with normal gait. Therefore, recognizing the influence of spatiotemporal adjustments on healthy gait can broaden our understanding of the applicability of gait quality markers.
This study aimed to identify the causal relationship between the stride length-frequency walking ratio index (R_SL/SF) at the self-selected walking speed (SSWS) and optimal walking speed (OWS) and the locomotor rehabilitation index (LRI) in healthy adults.
Healthy adults (n = 68) of both sexes aged 20-59 years were included in this study. The SSWS was determined using a 30-m walkway. The OWS and LRI were predicted by equations proposed in the literature. The volunteers walked on the treadmill at speeds corresponding to the OWS and SSWS in two bouts of 60 s each, with a break in between. The spatiotemporal parameters were recorded using a high-speed digital video camera, digitalized, and mathematically processed. Multiple linear regression was applied using the forced regression method.
Significant correlations were found between the LRI and R_SL/SF at the SSWS (R = 0.397; p < 0.001) and OWS (R = 0.266; p = 0.014). The regression model showed that 16 % of the variability in the LRI was attributable to the R_SL/SF variability at the SSWS. The average and 95 % confidence interval LRI were 94.7 % (91.6 %-97.8 %).
The LRI average is around 95 % for healthy and young adults and the R_SL/SF explained just 16 % of the variance in LRI.
步行速度是一个功能性生命体征，会分别影响机械参数。此外，病理步态往往在较慢速度下出现，这并不总能与正常步态进行充分比较。因此，认识到时空调整对健康步态的影响可以拓宽我们对步态质量标志物适用性的理解。
本研究旨在确定健康成年人在自选步行速度（SSWS）和最佳步行速度（OWS）下的步长-频率步行比指数（R_SL/SF）与运动康复指数（LRI）之间的因果关系。
本研究纳入了68名年龄在20至59岁之间的健康成年男女。使用30米长的步道确定SSWS。OWS和LRI通过文献中提出的方程进行预测。志愿者在跑步机上以对应于OWS和SSWS的速度各步行60秒，中间休息。使用高速数字摄像机记录时空参数，进行数字化处理并进行数学运算。采用强制回归法进行多元线性回归。
在SSWS时LRI与R_SL/SF之间存在显著相关性（R = 0.397；p < 0.001），在OWS时也存在显著相关性（R = 0.266；p = 0.014）。回归模型显示，LRI变异性的16%可归因于SSWS时R_SL/SF的变异性。LRI的平均值和95%置信区间为94.7%（91.6%-97.8%）。
健康年轻成年人的LRI平均值约为95%，R_SL/SF仅解释了LRI方差的16%。
