UMass Amherst KIN 470 - Lab 3 Handout_Vo2Max_adjusted (4 pages)

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Lab 3 Handout_Vo2Max_adjusted



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Lab 3 Handout_Vo2Max_adjusted

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Pages:
4
School:
University of Massachusetts Amherst
Course:
Kin 470 - Exercise Physiology

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LABORATORY 3 MAXIMUM OXYGEN CONSUMPTION IMPORTANT TERMS 1 2 3 4 5 6 7 Cardiac Output Oxygen Delivery Oxygen Utilization AVDO2 Maximal aerobic power VO2 max Incremental exercise test Ventilatory Breakpoint IMPORTANT CONCEPTS 1 2 3 Max VO2 HR max SV max AVDO2 max Fick Equation Relationship of VO2 work and heart rate Measurement of VO2max a Incremental test b Prediction test INTRODUCTION In the early 1920 s Hill and Lupton reported that each individual has a maximum level of oxygen uptake The energy required for work to be done above this maximum level is provided by anaerobic metabolism In the 1950 s Astrand and Taylor developed standard experimental techniques for measuring the maximum oxygen consumption denoted as VO2 max The procedure they developed depends on the progressive relationship between VO2 and work rate At a certain point further increases in the work rate do not produce any further increases in VO2 VO2 max is generally considered to be the best single physiological indicator of an individual s ability to sustain dynamic muscular activity and is a measure of aerobic power Measurement of VO 2 max involves a progressive incremental test performed on an exercise device such as a treadmill or cycle ergometer The test can either involve work being performed continuously or with rest periods interspersed between exercise bouts discontinuous test The two factors that determine VO2 max are the capacity for oxygen delivery and oxygen utilization Maximum oxygen delivery is a direct function of the oxygen carrying capacity hemoglobin saturation and cardiac output Q which is the amount of blood pumped by the heart per minute Cardiac output is dependent on stroke volume the amount of blood pumped per heartbeat SV and heart rate HR Q SV HR Oxygen utilization depends on the cellular capabilities of the muscle for aerobic metabolism These include aerobic enzyme activity number and size of the mitochondria muscle perfusion and capillary density The difference in oxygen



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