Exercise tests to evaluate CR function Flashcards
What information does a ACSM health screen process give you?
-individuals current level of physical activity
-presence of signs/symptoms and or known metabolic CV or renal disease
-desired exercise intensity (their personal goals)
-measurement: HR, BP, serum Cholesterol, ECG if GXT is diagnostic
-PAR-Q+ is a physical activity readiness questionaire
What is a submaximal GXT (graded exercise test)
-HR measurement at each stage of test from light work (<3 METs) to a predetermined end point
-treadmill, cycle ergometer or step
What is a Maximal GXT test?
working to exhaustion or symptoms of angina or dyspnea
-CRF = last work rate
what is a maximal not graded test?
physiological measurements made at the completion of test rather than at each stage
Examples of maximal run tests
cooper’s 12 or 1.5 mile walk/run
what are advantages of maximal run tests
moderately high correlation with VO2 max
-natural activity
-large numbers can perform at once
-low cost
What are disadvantages of maximal run tests
-difficult to monitor physiologic responses
-motivation
-not graded but max effort
Walk test - maximal test
-alternative to max run test – walk a mile as fast as you can and measure HR for only 10 seconds
-can be used to predict VO2 max
-walks 1 mile as fast as possible on a flat track
-measure HR at end and calculate VO2 max
-as fitness improves, time and HR decrease and VO2 max increases
GXT measurements
-HR: shoulder be measured for only 10 seconds because it changes rapidly
-BP
-ECG: used to dx CHD, arrhythmias, ST segment changes
-RPE: indicators of subjective efforts, large variability between subjects but not within subjects
VO2 max primary criteria
-standard estimate of CRF (cardiorespiratory function)
- VO2 fails to increase when workload is increased yielding a plateau in VO2
-only observed in 50% of healthy adults (that are able to reach that plate)
VO2 Max secondary criteria
post exercise blood lactate concentration >8mmole/L
-R> 1.15 (respiratory exchange ratio = VCO2/VO2
-accumulate CO2 and decrease pH
-causing hyperventilation
Where is the highest VO max reach on?
a treadmill running up a grade, then walking up a grade, then cycle ergometer
VO2 max convention
VO2 max is measurement on a treadmill graded running test and VO2 peak describes highest VO2 achieved on a cycle or ergometer or walking
VO2 max estimate from max work load
-important that test is used to determine work is best suiting for the individual (a cyclist should be on a bike)
- if increments are too large or too shot for person to achieve a steady state - equators will overestimate persons VO2 max
-used last completed stage to compute VO2 max
VO2 max estimate from submit work
-based on HR response
-plot HR abasing estimated VO2 until reach 70-85% of age predicted max HR
-extrapolate to max HR
Aerobic tests treadmill
-treadmill: Bruce treadmill for Max O2 consumption (stress test)
aerobic test run/walk/jog test
Cooper run test,
Cooper 1.5 mile test,
Cooper 12 minute run test,
George jog test,
rockport walk test,
6 minute walk test
aerobic test cycle ergometer
-cycle ergometer: astrand cycle test for sub maximal and cycle max O2 test
aerobic test step test
step test: forestry step test
GXT protocols for teadmill
Balke standard protocl:
-submax = 3 mph, 2.5% each 2 minutes and terminated at 85% of age predicted max HR
GXT protocols for cycle ergometer
YMCA protocol
GXT protocols for step test
mCAFT step test
-submax using lowest 2 8” steps
