EFFECTS OF FOOT STRIKE PATTERN AND SPEED ON MULTISEGMENT FOOT KINEMATICS IN NORMAL ADULT RUNNING

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  • FUJIWARA Hiroki
    Showa University Graduate School of Health Sciences
  • NAKAMURA Daisuke
    Department of Physical Therapy, Showa University School of Nursing and Rehabilitation Sciences
  • NAKABO Toru
    Department of Physical Therapy, Showa University School of Nursing and Rehabilitation Sciences
  • SEKIYA Noboru
    Department of Physical Therapy, Showa University School of Nursing and Rehabilitation Sciences

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Other Title
  • 健常成人の走行における足部内関節運動への足部接地パターンと速度の関与
  • ケンジョウ セイジン ノ ソウコウ ニ オケル ソクブ ナイ カンセツ ウンドウ エ ノ ソクブ セッチ パターン ト ソクド ノ カンヨ

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Abstract

Recently, several research groups have devised new methods that treat a foot as a multisegment structure to capture the foot movement precisely. The model reported by Leardini is thought to be superior in terms of reproducibility and validity. The foot strike pattern during running has attracted attention from researchers of biomechanics, but only a few researchers have studied the effect of the foot strike pattern using a multisegment foot model. In addition, most previous studies that examined foot kinematics during running did not take into consideration the influence of the running speed. Therefore, the purpose of this study was to reveal the effects of the foot strike pattern and speed on foot kinematics during running with Leardini’s multisegment foot model. The study included 10 healthy adults. They ran at 2 different speeds （110 and 140m/min） with rearfoot and forefoot strike. The three-dimensional kinematics of rearfoot, midfoot, and forefoot during running were evaluated. As a result, the effects of the foot strike pattern on the joint angles were detected in all the rotations （dorsiflexion-plantarflexion, inversion-eversion, and adduction-abduction） of model Bp, in dorsiflexion-plantarflexion and adduction-abduction of the model Bm, and in inversion-eversion and adduction-abduction of model Ba during the first half of the stance phase. The effects of speed were detected at the initial contact and toe-off in model Bp, at initial contact in model Ba, and at midstance in model Bm. Some of these results are new findings, and other results support the findings of previous studies, which suggests that these are useful in the accurate evaluation of foot motion during running.

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