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Purpose learn the basis and technique involved in administering the YMCA Cycle Ergometer Test, Astrand-Ryhming and Bruce Treadmill Test for estimating Aerobic capacity/power. Aerobic is with oxygen For Muscles to be supplied with increased oxygen these must occur 1) increased cardiac output 2) increased ventilation 3) a diversion of a greater proportion of the cardiac output to the active muscles. Cardiac Output the amount of blood pumped by the heart each minutes, is usually expressed as liters/minutes Cardiac output = HR x SV Stroke Volume the amount of blood pumped per beat of the heart VO2Max SV x HR x A-VO2 difference A-VO2 difference the difference between the amount of O2 extracted or consumed by the muscles and body(arterial minus venous blood O2 difference). The YMCA and Astrand-Ryhming cycle test and Bruce Treadmill Test can be used as a test of___ Physical Work Capacity (PWC) or cardiorespiratory fitness and can be used to ESTIMATE maxVO2 Tests are based on the following 1) as cardiorespiratory fitness increases, heart rate at a given sub-maximal workload decreases 2) the higher cardiorespiratory fitness results in a higher max VO2 Tests used to estimate maxVO2 include: step-bench tests, the 9 and 12-min run tests and 1 to 1.5 mile run tests. Maximal Oxygen Uptake(VO2max) estimates in Liters per minute (l/min) for the Astrand-Ryhming Test Tables Heart Rate vs Work Load. Age Correction YMCA Cylce Test Can be used to predict VO2 based on the linear relationship between HR and work rate (VO2) at a heart rate over 110 YMCA Test mustextrapolate HR-work rate relationship out to max HR Cycle at____ RPM 50 1st Workload = _______ 150 kgm = 0.5 kp Each stage lasts ________ 3 minutes Take heart rate during the last ______ 2 min of each stage Heart rates during last 2 min of each stage should be within __ beats of each other, if not add 1 additional minute 5 Complete ____one work stage past the stage where a HR of 110 was reached ONLY Draw line through HRs starting at HR>110 ml/kg/min = (L/min x 1000)/body wt in kg ___RPM 50 ___min stages 3