EQN 3050 Lecture Notes - Lecture 14: Cortisol, Hematocrit, Cardiovascular Disease

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Measures of fitness: v4 velocity at which blood lactate reaches 4 mmol/l. Increases with increasing fitness: v200 velocity at which hr reaches 200 bpm. Increases with increasing fitness alternative: determine the blood lactate and or hr at a predetermined velocity. Advantages of treadmill tests control of the physical environment. Footing speed/duration of each step of the exercise can be precisely controlled: easy access to the horse during/after exercise for sample collection. Treadmill vs. track responses: at (cid:448)4 (cid:448)200 lower hr, higher speed (10%) or incline (1-2%, stride length increased, stride frequency decreased the biomechanics of locomotion is quite different. Treadmill has its place but is not a replacement for field studies! Eas(cid:455) to i(cid:373)ple(cid:373)e(cid:374)t a(cid:374)d ideall(cid:455) should(cid:374)(cid:859)t disrupt (cid:374)or(cid:373)al trai(cid:374)i(cid:374)g s(cid:272)hedules. Maintain consistency in: warm-up routine prior to testing rates and distances of acceleration during exercise speed during the exercise test distances or times, post-exercise activity, environmental conditons time after exercise at which blood is collected.

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