ENS 304L Lecture Notes - Lecture 8: Lactic Acid, Sae Steel Grades, Exercise Intensity
12 Feb 2018
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Introduction: performing a graded and intense exercise test on the cycling machine to measure the lactate and ve responses during exercise and post-exercise. The purpose of this test is to analyze the effect of increasing exercise intensity on blood lactate. As exercise intensity increases initially, the blood lactate should increase slowly as type i fibers metabolize. As exercise increases to even higher intensities, the blood lactate will increase more rapidly as the type ii fibers begin to be recruited. This protocol increases with intensity to properly document the lactate and identify the transition from type i fibers being recruited to type ii fibers being recruited. Discussion: the subject showed a slow increase in lactate through the first 9. 5min where the type i fibers were being recruited because of moderate intensity. This occurs as a rapid increase in circulating epinephrin to stimulate greater and faster carbohydrate metabolism with less available oxygen present and increasing the reliance on anaerobic pathways.
