Chapter 4: Assessing Cardiorespiratory Fitness Flashcards
What is the most important component of physical fitness?
cardiorespiratory endurace
What is cardiorespiratory endurance?
“ability to perform dynamic exercise involving large groups of muscles at mod to high intensity for prolonged periods”
What is VO2 max?
maximum oxygen uptake
What is the most valid measure of functional capacity of the cardiorespiratory system?
VO2 max
What does VO2 max reflect?
capacity of heart, lungs, and blood to deliver oxygen to the working muscles during dynamic exercise
Is a “plateau phenomenon” a prereq for identifying true VO2 max?
No
What is VO2 peak?
the highest rate of oxygen consumption measured during the text (does not necessarily = VO2 max)
What is Absolute VO2?
measured in liters per minute (directly related to body size)
aka just a final value
What is Relative VO2?
used to classify an individual’s cardiorespiratory fitness level or compare fitness (takes various body sizes in account)
aka gives a rating based on body weight
What test should you perform before the state of a vigorous exercise program if they are high risk with s/sxs?
graded maximal test
What test should you perform before the state of a vigorous exercise program if they are low risk?
submaximal test
What are some pros of doing a submaximal testing?
- less costly
- less time-consuming
- still gives reasonable estimate
What are some cons of doing a submaximal test?
- less sensitive as diagnostic tool for heart disease
If VO2 plateau does not appear, what other factors indicate VO2 max?
- failure of HR increase with increase intensity
- venous lactate concentration > 8mmol
- respiratory exchange ratio (RER) > 1.15
- rating of perceived exertion (RPE) > 17
T/F: Maximal exercise tests are no more dangerous than submaximal tests (provided you follow guidelines and correctly monitor)
True
What is moderate intensity on the Borg scale?
12-14
What are RPEs used for?
determine endpoints of GXT
What are some indications for terminating an exercise test?
- angina
- drop in systolic BP from baseline BP despite increase in workload
- excessive rise in BP
- shortness of breath, wheezing, leg cramps, etc.
- change in heart rhythm
- client request to stop
What is a continuous exercise test?
no rest in between work increments
What are discontinuous exercise tests?
the client rests 5-10 minutes between workloads
What is the VO2 max different between cycle ergometer tests and treadmill tests?
VO2 max for cycle was 6%-11% lower than for treadmill
What speed does the client need to go at for the leg and arm ergometry GXT for it to be accurate?
client needs to attain aa steady state during the maximal GXT test
What does the bench stepping maximal GXT need to be adjusted for?
step height and stepping rate for differences in body weight
this makes standardization of the work extremely difficult
What do you monitor during submax tests?
HR BP and PRE
What are the assumptions of submax GXTs?
- a steady stage HR is achieved and consistent for each exercise work rate
- a linear relationship between VO2 and HR within range of 110 to 150
- mechanical efficiency during cycling or treadmill exercise is constant for all individuals (but a client w poor mechanical efficiency while cycling has higher submax HR at a given workload, and his actual VO2 max is underestimated)
- HRmax for similar aged clients is similar (even though age only accounts for 80% of one’s HRmax)
Is VO2 max over or underestimated in submax tests?
overestimated for highly trained individuals and underestimated for untrained, sedentary individuals
What is the least desirable way of assessing aerobic fitness?
Field tests, they should not be used for diagnostic purposes
How long should distance runs be in order to assess aerobic function?
at least 9 mins - 12 mins
What does the validity of step tests depend on?
obesity, height, fitness level, and the accurate measurement of HR
step tests are usually less valid than distance run tests
What tests are good for children and older adults?
a treadmill protocol that increases grade rather than speed
