Eccentric exercise augments the cardiovascular response to static exercise.

M P Miles; Y Li; J P Rinard; P M Clarkson; J W Williamson

doi:10.1097/00005768-199704000-00006

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Eccentric exercise augments the cardiovascular response to static exercise.

M P Miles·Y Li·J P Rinard·P M Clarkson·J W Williamson

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Abstract

High-force eccentric exercise induces neuromuscular dysfunction and may augment the cardiovascular response to exercise. This investigation sought to determine whether changes in strength and sense of force following high-force eccentric exercise alter heart rate and blood pressure responses during isometric contractions. Subjects (4F,6M) performed 50 maximum resistance eccentric actions with one arm (ECC arm). Contractions at 10% of the ECC arm maximum were held for 7 min on two pre-exercise days. The force output perceived to be the same as 10% of the pre-exercise maximum was determined using a force matching task. This force, 35.6, 27.2, and 21.1% lower on days 1, 3, and 5 post-exercise, was held during isometric contractions on these days, respectively. Despite a lowering of absolute contraction force, heart rate (P < 0.05) and blood pressure (P < 0.001) responses during contractions using the ECC arm were consistently elevated relative to the control arm. However, subjects perceived that they were exerting forces similar to those achieved before eccentric exercise-induced neuromuscular dysfunction. These findings suggest that perceived effort following strength loss induced by mechanically stressful exercise dictates the cardiovascular responses during isometric contractions.

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M P Miles, Y Li, J P Rinard, P M Clarkson, J W Williamson. 1997. Eccentric exercise augments the cardiovascular response to static exercise.. https://doi.org/10.1097/00005768-199704000-00006

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