Metabolic Cart Flashcards
Why do we care about oxygen consumption
For disease and athletic performance
What is VO to Max value is good for
Indicating cardio respiratory fitness
What was the highest vo2 to ever recorded
Skier 96, cyclist 97.5
Where do we see VO2 in the 15’s or 20s
And pulmonary disease and heart failure
What is substrate utilization
What are we using for energy. their range is between 0.7 and 1.15.it increases with exercise because of the increased need for carbohydrates we burn more fat at rest
What is the difference between RER and RQ?
RQ is cellular metabolism it is similar to RER at rest BUT exercise it is not because it has a maximum of one.RER Can be higher than one because there is added CO2 in the body when dealing with lactic acid during exercise
What are the four substrates That can be burned
Fat carbs protein and alcohol. we only burned protein with long distance running and starvation
What kind of metabolic carts do we use?
Indirect calorimetry via open circuit spirometry because the air comes from the room.
What is the purpose of the metabolic cart
To collect and analyze inspired an expired gas is in order to determine things like oxygen consumption , energy expenditure, and substrate utilization
Why do we want the honeycomb in on the pneumotach
To smooth out the air so it is not turbulent we want laminar flow calibrated at 3 L
What kind of flow rate should we do if we are going to do it heavy exercise
Hi flow rates
What does it mean if there is a dot over in equation
It means there is a time component it is a rate
What is an average relative VO2 for college students
35 to 45 mL per kilogram minute
What is a normal absolute VO2
4.5 L per minute
Why do we use relative instead of absolute
Compare better relative to their body mass
What is the difference between a max and a peak
Amax as high as we can possibly get. a peek would be done using a cycle or arm ergometer . it is not as high as we could go but as high as we can go with that mode of exercise . if we give up before we think we reached max we would call it a peek
What is the best predictor of VO 2Max
The plateau and decrease is best . this is because a graded exercise test gets harder . heart rate should respond the same because workload increases but VO2 doesn’t
What is the error in 220 minus age
10 to 15 bpm
What is the substrate use when we are starving
First the car will go first which is called bonking, then fats ,then protein, then the muscles eat themselves
What is stroke volume at rest and how high can I go
60 to 70 mL it can reach 200
What if the heart rate plateaus
We should not expect VO2 to increase because the AV 02 difference can’t change and stroke volume already plateaued
Why does RER skyrocket after exercise
Because CO2 to increases with lag affect and oxygen is decreased
Why do we care about RER
Because in an aerobic athlete we want to go because of spares carbs and uses fat
What is a calorie
A measure of heat
