Medial Gastrocnemius Muscle Activity during Single-Leg Hopping to Exhaustion. Issue 5 (2nd September 2020)

• Record Type: Journal Article
• Authors: Mudie, Kurt L.; Clothier, Peter J.; Hilliard, Ryan J.; Gupta, Amitabh
• Is Part Of: Journal of motor behavior. Volume 52:Issue 5(2020)
• Page Start: 601
• Page End: 611
• Publication Date: 2020-09-02
• Subjects: Augmented feedback -- fatigue -- feed forward -- motor control; Human mechanics -- Periodicals; Movement, Psychology of -- Periodicals; Motor Activity -- Periodicals; Motor Skills -- Periodicals; Bewegingsleer; Mécanique humaine -- Périodiques; Psychomotricité -- Périodiques; 612.705
• DOI: 10.1080/00222895.2019.1664976
• Languages: English
• ISSNs: 0022-2895

Abstract

Abstract: This study described changes in leg muscle activation characteristics during exhaustive single-leg hopping. Twenty-seven healthy men performed trials (132 hops/min) to exhaustion, without a target height, to a target height with visual feedback and target height with tactile feedback. Mean muscle activation amplitude of the medial gastrocnemius (MG) decreased during the anticipatory period while duration of MG activity was maintained when hopping to a target height and contrasted the changes during hopping without a target height. Changes to MG activity were specific to whether the hopping height had been maintained or not. Changes during the anticipatory period of MG activity, indicative of adaptation in descending motor pathways, implicate utility of a motor learning strategy to allow completion of an exhaustive task.