Definition and clinical relevance of maximal oxygen consumption (VO₂ max)
Plateau of O2 consumption w/ increased workload.
VO2 max
Submaximal tests used to predict maximal aerobic capacity.
Predictive tests
Defined as 1.6 - 2.9 METs.
Light intensity
HR recovery post exercise:
drop at least 12 beats after 1 min or 22 bpm after 2 mins.
Normal recovery response after exercise
Beta-blocker medications can reduce the heart rate response during exercise and, therefore, put a patient at risk
Effects of some medications on vitals response
VO2 max is measured in
Rate of Perceived Exertion, used instead of HR to track intensity.
RPE
Defined as 3.0-5.9 METs.
Moderate intensity
DBP stays the same or slight drop with aerobic exercise
Normal response to Physical activity DIASTOLIC BLOOD PRESSURE
Prior to conducting a maximal or submaximal aerobic capacity test, a full medical and surgical history should be taken.
Standard procedures and recommendations for clients prior to submaximal testing
Predicts VO2max and is functional for limitations of participants due to disease or functionality.
Submaximal aerobic testing
Submaximal tests used to predict maximal aerobic capacity.
Predictive tests
Defined as ≥6.0 METs.
Vigorous intensity
SBP increases with increasing workloads at a rate of ≈10 mm Hg per 1 MET
Normal response to Physical activity SYSTOLIC BLOOD PRESSURE
Medications that blunt normal sympathetic response.
B-Blockers
Gold standard for max aerobic capacity.
Maximal oxygen consumption exercise tests
Example of a predictive test.
Modified Bruce Treadmill Test
HR and BP should be obtained prior to the start of the exercise test.
Baseline measurements
Should remain near resting levelheart and lungs need to work
Normal response to Physical activity O2 SATURATION - aerobic and resistance/isometric exercises (vitals)
Normal ROM values for knee
Knee flexion is 135 degrees, extension is 0 degrees.
A scale from 6 (no exertion) to 20 (very, very hard) to measure exercise intensity.
RPE Borg scale
Example of a performance test.
Self paced walking test
Standardized method for quantifying the absolute intensity of various behaviors and activities.
MET levels of intensity
Increases linearly with aerobic activity as intensity increases
Little change with isometrics
Normal response to Physical activity RESPIRATORY RATE - aerobic and resistance/isometric exercises (vitals)
Normal ROM values for elbow
Elbow flexion is 140-150 degrees, extension is 0-10 degrees