American Society of Biomechanics Journal of Biomechanics Award 2021: Exploring the Functional Boundaries and Metabolic Consequences of Triceps Surae Force-Length Relations during Walking.

ABSTRACT: The relationship between individual muscle dynamics and whole-body metabolic cost is not well established. Here we use biofeedback to modulate triceps surae (TS) activity during walking to test the following hypotheses based on basic principles of muscle physiology: (1) increased TS activity would increase metabolic cost via shorter muscle fascicle lengths and thus reduced force capacity and (2) decreased TS activity would decrease metabolic cost via longer muscle fascicle lengths and thus increased force capacity. 23 young adults walked on an instrumented treadmill at 1.25 m/s using electromyographic (EMG) biofeedback to match targets corresponding to ±20 and ±40% TS activity during push-off (late stance). B-mode ultrasound imaged the medial gastrocnemius (MG). Participants increased net

SUBMITTER: Funk CJ 

PROVIDER: S-EPMC10529775 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature