Forefoot-rearfoot coupling patterns and tibial internal rotation during stance phase of barefoot versus shod running. [Clin Biomech (Bristol, Avon)] Journal article | | Title | Forefoot-rearfoot coupling patterns and tibial internal rotation during stance phase of barefoot versus shod running. | | Author(s) | Eslami M, Begon M, Farahpour N, Allard P | | Institution | Department of Kinesiology, University of Montreal, Montreal, Que., Canada; Laboratoire d’Étude du Mouvement, Centre de Recherche, Hopital Sainte-Justine, P.O. Box 3175, Côte-Sainte-Catherine, Montreal, Que., Canada H3T 1C5; Department of Physical Education and Sport Sciences, University of Mazandaran, Iran. | | Source | Clin Biomech (Bristol, Avon) 2006 Oct 16. | | Abstract | BACKGROUND: Based on twisted plate and mitered hinge models of the foot and ankle, forefoot-rearfoot coupling motion patterns can contribute to the amount of tibial rotation. The present study determined the differences of forefoot-rearfoot coupling patterns as well as excessive excursion of tibial internal rotation in shod versus barefoot conditions during running.
METHODS: Sixteen male subjects ran 10 times at 170 steps per minute under the barefoot and shod conditions. Forefoot-rearfoot coupling motions were assessed by measuring mean relative phase angle during five intervals of stance phase for the main effect of five time intervals and two conditions (ANOVA, P<0.05). Tibial internal rotation excursion was compared between the shod and barefoot conditions over the first 50% of stance phase using paired t-test, (P<0.05).
FINDINGS: Forefoot adduction/abduction and rearfoot eversion/inversion coupling motion patterns were significantly different between the conditions and among the intervals (P<0.05; effect size=0.47). The mean absolute relative angle was significantly modified to 37 degrees in-phase relationship at the heel-strike of running with shoe wears. No significant differences were noted in the tibial internal rotation excursion between shod and barefoot conditions.
INTERPRETATION: Significant variations in the forefoot adduction/abduction and rearfoot eversion/inversion coupling patterns could have little effect on the amount of tibial internal rotation excursion. Yet it remains to be determined whether changes in the frontal plane forefoot-rearfoot coupling patterns influence the tibia kinematics for different shoe wears or foot orthotic interventions. The findings question the rational for the prophylactic use of forefoot posting in foot orthoses. | | Language | ENG | | Pub Type(s) | JOURNAL ARTICLE
| | PubMed ID | 17049700 |
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