Pre-Power-Stroke Cross-Bridges Contribute To Force During Stretch Of Skeletal Mu

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Pre-Power-Stroke Cross-Bridges Contribute To Force During Stretch Of

Skeletal Muscle Myofibrils

http://www.medicalnewstoday.com/articles/116368.php

When muscles are stretched while activated they produce large forces

that cannot be readily explained by the current models of muscle

contraction. The current experiments investigated the mechanisms behind

stretch forces, and its association with the molecular basis of

contraction. After performing experiments with sub-cellular muscle

structures (i.e. myofibrils) it was concluded that muscle stretch

changes the characteristics of muscle molecules while working to

produce force. The result is important as stretch forces are behind

several aspects of the everyday life, including muscle damage, walking

downstairs, and landing from jumping.