AI Article Synopsis
- The study examined how the timing and intensity of postural muscle activation changes based on the center of foot pressure (CFP) during standing.
- Subjects were categorized into three groups based on their CFP positions: backward, middle, and forward, as they performed bilateral arm movements.
- Findings showed no significant differences in activation magnitude of the biceps femoris and erector spinae muscles across the CFP positions, but the BF exhibited earlier activation patterns when in the forward position compared to the others.
Article Abstract
We investigated changes in activation timing and magnitude of the postural muscles according to initial standing positions. The subjects were divided into three groups depending on the position of the center of foot pressure (CFP) during quiet standing, namely backward, middle, and forward. Subjects maintained standing postures at various CFP positions in the anteroposterior direction, and then started bilateral arm movement at their own pace. The activation magnitude of the biceps femoris (BF) and erector spinae (ES) did not differ among any of the initial CFP positions. In only the BF, the preceding action to the anterior deltoid (AD) was clearly observed at more forward CFP positions in the order of the forward, middle and backward groups. Between initial CFP positions adjacent to quiet standing posture, the smallest change was observed in the preceding activation time of the BF. Significant correlation was observed between the background activity and activation time in both the BF and ES.
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| http://dx.doi.org/10.1016/s0966-6362(02)00100-5 | DOI Listing |
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