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Stressor-Induced Increase In Muscle Fatigability Of Young Men And Women Is Predicted By Strength But Not Voluntary Activation, Manda Keller-Ross, Hugo Pereia, Jaclyn Pruse, Tejin Yoon, Bonnie Schlinder-Delap, Kristy Nielson, Sandra Hunter
Stressor-Induced Increase In Muscle Fatigability Of Young Men And Women Is Predicted By Strength But Not Voluntary Activation, Manda Keller-Ross, Hugo Pereia, Jaclyn Pruse, Tejin Yoon, Bonnie Schlinder-Delap, Kristy Nielson, Sandra Hunter
Kristy Nielson
This study investigated mechanisms for the stressor-induced changes in muscle fatigability in men and women. Participants performed an isometric-fatiguing contraction at 20% maximal voluntary contraction (MVC) until failure with the elbow flexor muscles. Study one (n = 55; 29 women) involved two experimental sessions: 1) a high-stressor session that required a difficult mental-math task before and during a fatiguing contraction and 2) a control session with no mental math. For some participants (n = 28; 14 women), cortical stimulation was used to examine mechanisms that contributed to muscle fatigability during the high-stressor and control sessions. Study two (n = 23; …