KNES 466 Lecture Notes - Lecture 4: Vo2 Max, Stroke Volume, Cardiac Catheterization

• School: University of Maryland
• Department: Kinesiology
• Course: KNES 466
• Professor: marc Rogers

Document Summary

The most important relationship in cardiovascular exercise physiology. Cardiac output (q) = hr x sv: typical resting value = 5-6l, typical blood volume = 5-6 l, blood is circulated through the body roughly once per minute. Increases to 20-22 l/min in maximal exercise in healthy persons. Size of heart is directly related to cardiac output. Cardiac index=a way to normatively compare nsh and healthy persons: resting co divided by surface area of individual (height in meters, l/min/m2. Can measure co by: cardiac catheterization (invasive, not normally performed for a gxt, doppler echo (not invasive, can see the. Resting a-v o2 ~ 5ml per 100ml of blood. Arterial is 20ml, venous is 15ml: subtract 20-15, =5ml. At maximal exercise, 15-18ml (higher in healthier individuals: can never hit 20, however. Vo2: resting=3. 5ml/kg/min, =1 met (metabolic equivalent, heavy increase from rest to maximal exercise, 45-50, endurance trained up to about 70-80s.