title: Strength and muscle activities during the toe-gripping action: comparison of ankle angle in the horizontal plane between the sitting upright and standing positions.
abstract: [Purpose] The aim of this study was to investigate whether toe grip strength and muscle activities are affected by the ankle angle in the horizontal plane in the sitting upright and standing positions. [Subjects] The subjects were 16 healthy young women. [Methods] We measured toe grip strength and the maximum voluntary contraction activities of the rectus femoris, biceps femoris, anterior tibialis, and medial head of the gastrocnemius. In addition, we calculated the percent integrated electromyography during foot gripping in 3 different ankle joint positions between the long axis of the foot and the line of progression on the horizontal plane, namely 10° of internal rotation, 0°, and 10° of external rotation. [Results] Two-way analysis of variance revealed significant differences. A significant main effect was observed in the measurement conditions for the percent integrated electromyography of the rectus femoris muscle and long head of the biceps femoris. However, two-way analysis of variance did not reveal any significant difference, and a significant main effect was not observed in toe grip strength. [Conclusion] These findings suggest that exerted toe grip strength is only slightly affected by the ankle angle in the horizontal plane in the sitting upright and standing positions. Therefore, the current measurement positions were shown to be optimal for measurement.
authors.affiliation: Course of Rehabilitation, Department of Health Sciences, Tohoku Fukushi University, Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Soma
authors.affiliation: Course of Physical Therapy, Department of Health Sciences, Kyoto Tachibana University, Japan.
authors.forename: Shin
authors.initials: S
authors.lastname: Murata
authors.affiliation: Course of Physical Therapy, Department of Health Sciences, Kyoto Tachibana University, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kai
authors.affiliation: Course of Rehabilitation, Department of Health Sciences, Tohoku Fukushi University, Japan.
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Nakae
authors.affiliation: Course of Rehabilitation, Department of Health Sciences, Tohoku Fukushi University, Japan.
authors.forename: Yousuke
authors.initials: Y
authors.lastname: Satou
keywords: Measurement position; Muscle activity; Toe gripping strength