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The effect of fatigue on knee position sense is not dependent upon the muscle group fatigued
Author(s) -
Ribeiro Fernando,
Venâncio João,
Quintas Pedro,
Oliveira José
Publication year - 2011
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.22018
Subject(s) - eccentric , concentric , physical medicine and rehabilitation , isometric exercise , muscle fatigue , medicine , proprioception , physical therapy , isokinetic exercise , antagonist , electromyography , mathematics , physics , geometry , receptor , quantum mechanics
Muscle fatigue could have a greater impact on position sense when antagonists of the movement are fatigued. Hence, this study aimed to compare the effects of antagonist and agonist exercise‐induced muscle fatigue on knee joint position sense. Methods: This within‐subjects repeated‐measures study included 40 subjects. Knee position sense and muscle strength were measured before and after two exercise protocols consisting of 30 consecutive maximal concentric/eccentric contractions of the knee extensors or flexors on the isokinetic dynamometer at an angular velocity of 180°/s (3.14 rad/s). Results: Both exercise protocols increased the absolute angular error ( F 1.78 = 39.89, P < 0.001; knee extensors protocol from 2.0 ± 1.3° to 3.5 ± 2.0°, knee flexors protocol from 2.1 ± 1.2° to 3.7 ± 2.2°), and no differences were detected between protocols ( F 1.78 = 0.034, P = 0.855). No changes were observed in the relative angular error. Conclusions: Muscle fatigue affects knee position sense, and the deleterious effect is not different depending upon the muscle group fatigued. Muscle Nerve, 2011.