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Exercise Physiology Exam 2
Aerobic Exercise Testing
32
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Not Applicable
02/12/2005

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Term
Why do we test aerobic fitness? (4)
Definition
To determine fitness (for public health), for job screening (ie: firefighter), to predict performance, and to determine appropriate exercise prescription both in athletic and clinical settings.
Term
What major components affect aerobic performance? (3)
Definition
VO2 Max, Lactate Threshold, Movement economy.
Term
If you move very accurately, what do you improve?
Definition
Your movement economy.
Term
There are several types of tests; maximal, submaximal, laboratory and field. The type of test we choose depends on three major things. What are they?
Definition
Initial fitness ofthe subject, The purpose of the test, and the facilities (equipment, personnel)
Term
When predicting performance in a group of athletes with similar VO2 Maxes, what is a better predictor than VO2Max?
Definition
Lactate Threshold.
Term
What type of activity with the person with a high VO2max perform best at?
Definition
endurance.
Term
Define VO2max.
Definition
A plateau in the VO2 even with increasing exercise intensity.
Term
Define VO2 peak.
Definition
The highest VO2 attained.
Term
What are the secondary criteria to determine VO2max?(3)
Definition
1. RER>1.1, 2. HRmax 10bpm from predicted, 3. Blood lactate level of .8mmol/L.
Term
What is the only real proof that true VO2max has been attained?
Definition
The plateau.
Term
How long should a VO2max test last?
Definition
8-12 minutes.
Term
How long should the stages last when testing VO2Max?
Definition
1-3 minutes.
Term
What can happen if the stage duration in VO2max testing is too long or too short?
Definition
Muscles can be fatigued in a way that is unrelated to O2 uptake.
Term
The stage duration can't be too long when testing VO2 max, but it does have to be long enough to _____ what?
Definition
Reach steady state in each stage.
Term
What is the best mode of exercise performance if testing a patient who is unfamiliar with activity?
Definition
Treadmill.
Term
Why can you encounter error when using HR to determine VO2max?
Definition
Because HR is affected by arousal, hydration and the type of exercise. There is also individual variability in tolerance due to motivation, muscle strength and power, and anaerobic capacity.
Term
What is the relationship of work and VO2?
Definition
they have a linear relationship.
Term
What is a symptom-limited maximal test? these are especially useful in what patient population?
Definition
When the patient begins to feel symptoms (ie:chest pain or other abnormalities) the test is stopped. Otherwise, the patient carries on to their max. These tests are useful in the cardiac patient population because it is limited by physiological symptoms for safety.
Term
Describe how a submaximal VO2 test works.
Definition
You only let the subject work to a certain HR or predicted VO2, even if they could go further.
Term
In what patient population would you be most likely to use a submaximal aerobic capacity test with? Why?
Definition
In very unfit populations, so people don't hurt themselves, or if you don't have appropriate safety equipment in case of emergency.
Term
VO2 at the lactate threshold is the best predictor for performance on runs of what distance?
Definition
Long distance; >1500m (also, long distance cycling.
Term
Why might using the ventilatory threshold be prefereable to lactate threshold for VO2max estimation?
Definition
Because you get similar results to LT when using VT, as the relationships to VO2 are similar. However, VT is easier to get because it avoids sequential blood draws.
Term
If all else is equal, a higher movement economy relates to ____ VO2max
Definition
higher VO2 max
Term
If you have poor movement economy, what do you need to have in order to compete with someone who has good movement economy?
Definition
A higher VO2 max.
Term
Movement economy explanation. (not a question. just flip the card :)
Definition
Two people running at the same speed may have very different VO2 maxes, even though the work load is the same between the two people. This is because of the biomechanics each person employs to complete the activity. Experienced runners will have a lower VO2 at the same movement than someone who is not, because they have a good pattern of movement --> better movement economy --> higher VO2max than the person who is flopping their arms all over the place and using their body for momentum.
Term
How long does a maximal VO2 test last?
Definition
As long as it needs to last to get you to a point where you can't go any more.
Term
Tests like the bruce protocol use large work increments between stages. ie: difference between work at stage 1 and stage two is large. How does this impact the length of the stage?
Definition
The stages must be longer to allow the subject to reach steady state.
Term
Describe the size of increments and length of stage in the BALKE protocol.
Definition
Tiny increment increases, and short stages (each lasts less than one minute).
Term
If you wanted to test a cardiac patient, would you choose to use the Bruce, or the BALKE protocol?
Definition
BALKE.
Term
If patient A has a lower VO2 when running at the same velocity as patient B, what can you assume about their movement economies?
Definition
Patient A has a better movement economy than patient B.
Term
If you're looking at a graph of VO2 over running velocity, and patient A's slope is higher than patient B's, what does that tell you about their movement EFFICIENCIES?
Definition
Patient A has a worse movement efficiency because the slope is higher. Lower slope = better movement effiency.(The change in oxygen consumption for the same increase in workload is lower, which makes person B more efficient than person A).
Term
Can a person have good movement efficiency and poor movement economy?
Definition
Yup! They sure can!
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