ESS 3091- 5- Exercise Metabolism- Student-2

E atp synthesis depends on the type and mode of

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Unformatted text preview: cificity principle Adaptations in physiologic function (i.e. ATP synthesis) depends on the type and mode of overload imposed Highly Anaerobic stimulus ↔ Highly Aerobic stimulus Non-oxidative improvements ↔ oxidative improvements Power/strength benefits ↔ Endurance benefits The specificity of VO2max VO2max, as an indicator of aerobic fitness, is specific to the mode of activity Specificity Overload with endurance training provides improvement in those systems involved in oxygen transport and local, muscle adaptations ◦ Delivery of O2 ◦ Use of O2 for ATP production e us O2 O2 ry ive l de Anaerobic system training adaptations Adaptations that accompany strenuous training that overloads the anaerobic energy systems: ◦ Increased anaerobic substrate levels (PCr, glycolysis) Anaerobic system training adaptations ◦ Increased quantity & activity of key glycolytic enzymes Hexokinase PFK LDH ◦ Increased capacity to generate lactate ◦ Increased FT fiber size (hypertrophy) ◦ Increased recruitment of FT fibers Aerobic system training adaptations Endurance-trained skeletal muscle fibers can generate more ATP oxidatively ◦ ◦ contain more mitochondria Increased quantity & activity of oxidative enzymes ◦ Greater capacity to metabolize pyruvate ◦ Greater ability to use fat Delay glucose/glycogen oxidation (CHO sparing) Aerobic system training adaptations Greater proportion of slow-twitch fibers Greater capacity to deliver O2 to the ST fibers ◦ Pulmonary a...
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