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Updated: Jul 13, 2026
Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings
Published on: July 26, 2022
Influence of base of support size on arm pointing performance and associated anticipatory postural adjustments
Eric Yiou1, Alain Hamaoui, Serge Le Bozec
1Laboratory of Motor Control and Perception, Faculty of Sport Sciences, University of Paris-Sud 11, 91440 Orsay Cedex, France. e.yiou@libertysurf.fr
Abstract:
The current study was designed to test the effect of changing the base of support (BoS) size in the initial posture on the performance of a pointing task and the associated "anticipatory postural adjustments" (APAs). Subjects performed series of arm pointing tasks at maximal velocity, from five postures that differed by the antero-posterior (AP) distance between the heels. This distance was increased stepwise from 0 cm (P0 condition) to 40 cm (P40 condition). Kinetics data were collected with a large force-plate, and kinematics data of the pointing were collected with a bi-axial accelerometer (AP and vertical direction) fixed at the wrist. ANOVA showed that the amplitude and the efficiency of the APAs, as well as the performance of the pointing, all statistically increased from P0 to P40 (with 0.0001
