PHYS THER
Vol. 90, No. 7, July 2010, pp. 999-1000
DOI: 10.2522/ptj.20090161.ar
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Laura A. Prosser, Samuel C.K. Lee, Ann F. VanSant and Richard T. Lauer


Because this article has no abstract, we have provided an extract of the full text and any section headings.

We thank Wagenaar1 for his perspective on the influence of walking speed on muscle activation patterns and appreciate his contributions to the understanding of coordination dynamics during walking. We recognize that both trunk muscle activation patterns and kinematic trunk dynamics are important components of gait biomechanics and that each may influence the other. We emphasize, however, that neither can be inferred from the other at current levels of understanding.

The results that Wagenaar cites on the speed thresholds for different phase relationships of the pelvis and thorax2 originate from data from 4 adults who were healthy. With a small adult sample, we hesitate to assume that those speed thresholds for trunk and interlimb coordination are similar in young children during the first few years of walking. Wagenaar also suggests that despite the 2 groups having equal months of walking experience, the group with typical development (TD) likely had . . . [Full Text of this Article]


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