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Muscle Damage from Sustained Isometric Contractions
Full Title
Muscle damage in human elbow flexors after sustained isometric contractions
Summary
This study investigated how muscle damage accumulates during sustained isometric contractions of the human elbow flexors. Results showed that the majority of damage occurred during the plateau phase of the contraction, not the initiation or relaxation phases. Although mechanical strain was continuous, pain and muscle tenderness did not appear until later, during movement or physical activity. These findings reinforce the concept that tissue injury from isometric strain may not be perceived until after the event, aligning with delayed symptom onset in joint conditions like bursitis.