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PEDS200 (38)
Lecture

Cardio-Respiratory Exercise Physiology-3

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Department
Physical Education and Sport
Course
PEDS200
Professor
Dan Syrotuik
Semester
Fall

Description
Anaerobic threshold VO2 at which anaerobic energy production supplements aerobic energy production during graded exercise test Useful for training prescriptionsLactate Threshold Blood La exhibits abrupt or nonlinear increaseOnset of Blood Lactate Accumulation OBLA Blood La 40mMCaused by incr requirement for anaerobic glycolytic energyIncr recruitment of FT motor units Incr epinephrineBlood shunting to working muscle incr accumulation of blood La decr removalVentilatory Threshold VE disproportionately increasesIncr perception of energy demand by respiratory center in brainIncr afferent neural activity from musclejoint receptorsIncr H and CO2 levels chemoreceptors link LT and VTNormally LT causes VT not always slightly precedes VTVT can precede LT if subject has depleted muscle glycogenMcArdles Patients Lack phosphorylase dont produce much La
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