Neuromuscular dynamics during isometric knee contractions: effects of target force, knee angle, and tibial rotation on force steadiness.

ABSTRACT: This study investigated neuromuscular variations across low to moderate target force levels, three knee joint angles and tibial rotation positions, examining their correlations with muscle morphology and their collective impact on force steadiness (FS). Twelve young adult males performed knee extension tasks under three different tibial rotation conditions: internal rotation (IR), neutral rotation (NR), and external rotation (ER). All tasks involved submaximal isometric contractions at the knee joint. Participants performed submaximal isometric contractions at three knee joint angles (30°, 60°, and 90°) and three target force levels (10%, 40%, 70% of maximum voluntary isometric contraction (MVIC)). The electromyographic (EMG) signals from vastus medialis (VM), vastus lateralis (VL), and re

SUBMITTER: Yuan H 

PROVIDER: S-EPMC12012133 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature