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ANSC 330 Exercise Physiology I

Oxygenated air transfer o2 to deoxygenated blood

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Unformatted text preview: m blood expire CO2 and heat Major Systems Involved Cardiovascular: Cardiovascular: transports oxygenated blood and nutrients to muscle transports CO2 and other waste th t products away from muscle 5 Major Systems Involved Muscular: Muscular: contracts to move horse Major Systems Involved Integument: Integument: dissipates heat Common Goal: Goal: Provide O2 and fuel to working muscle to l t sustain muscle contraction Remove waste products 6 Heart Rate Increases With Exercise Intensity (Evans, Training and Fitness in Athletic Horses, 2000) Levels of Exercise Light 1-3 hrs/wk 40% walk, 50% trot, 10% canter Moderate Recreational, beginning training, occasional show horse Mean HR ~ 80 bpm 3-5 hrs/wk 30% walk, 55% trot, 10% canter, 5 % low jumping, cutting, other skill work School horses, recreational, polo, show horses, ranch Mean HR ~ 90 bpm (NRC, 2007) 7 Levels of Exercise Heavy Very Heavy 4-5 hrs/wk 20% walk, 50% trot, 15% canter, 15% gallop, jumping, other skill work Ranch work, polo, show horse, medium level eventing, eventing, race training Varies: 1 hr (speed work) to 6-12 hrs slow work 6Racing (QH, TB, Endurance), Elite 3-day 3event horse Mean HR ~ 110-150 bpm 110(~240 max) Mean HR ~110 bpm (NRC, 2007) Exercise = Work = Energy Exercise is achieved by contraction of muscles Muscle contraction require ATP (energy) At the onset of exercise: Body systems work to increase fuel availability for working muscle Maintain acid-b M i i acid-base balance id b l Limit body temperatur...
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