Changes in Muscle Control after Learning to Direct Pedal Forces in One-Legged Pedaling

Autor/inn/en	Park, Sangsoo; Van Emmerik, Richard; Caldwell, Graham E.
Titel	Changes in Muscle Control after Learning to Direct Pedal Forces in One-Legged Pedaling
Quelle	In: Journal of Motor Learning and Development, 9 (2021) 2, S.153-171 (19 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	2325-3193
Schlagwörter	Psychomotor Skills; Human Body; Physical Activities; Neurological Organization; Training; Biomechanics; Exercise Physiology; Young Adults; Kinetics + Suchen Sie Ihr Suchwort? Psychomotorische Aktivität; Menschlicher Körper; Ausbildung; Biomechanik; Sportphysiologie; Young adult; Junger Erwachsener; Kinetik
Abstract	The aim of this study was to describe how major leg muscle activities are altered after learning a novel one-legged pedaling task. Fifteen recreational cyclists practiced one-legged pedaling trials during which they were instructed to match their applied pedal force to a target direction perpendicular to the crank arm. Activity in 10 major leg muscles was measured with surface electromyography electrodes. Improved upstroke task performance was obtained by greater activity in the hip and ankle flexor muscles, counteracting the negative effects of gravity. Greater quadriceps activities explained improved targeting near top dead center. Reduced uniarticular knee and ankle extensor downstroke activities were necessary to prevent freewheeling. Greater hamstring and tibialis anterior activities improved targeting performance near the bottom of the pedal stroke. The activity patterns of the biarticular plantarflexors changed little, likely due to their contributions as knee flexors for smooth upstroke pedaling motion. These results add to our understanding of how the degrees of freedom at the muscle level are altered in a cooperative manner to overcome gravitational effects in order to achieve the learning goal of the motor task while satisfying multiple constraints--in this case, the production of smooth one-legged pedaling motion at the designated mechanical task demands. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01