Abstract
In daily lives, humans do not always perform a single motion separately, but they adequately transit their motions to achieve complex movements. Although human sit-to-stand and walking motions are reported to be explained from the small number of modules (called synergy), it has not been revealed how the transit motion (sit-to-walk) is achieved. This study conducted an experiment to measure body trajectory, reaction force and muscle activation of one healthy participant during sit-to-stand, walking and sit-to-walk motions. Results showed that muscle activation during sit-to-walk motion could be explained from the muscle synergies of sit-to-stand and walking. Moreover, it was implied that each muscle synergy needed to be activated adaptively in order to generate momentum and successfully initiate the first step.
