Oxygen Consumption
Oxygen Consumption: Y: Vo2 (l/min) X: time (min). The graph would
increase and then achieve a steady state
. This is dependent on the work
load. The higher the workload the higher the steady state is.
The area
within the rectangle that the graph makes it shows the oxygen you would
need. The formula is
Steady State times #min according to chart
. So
20X5 is 10L. However, in this example, the person is consuming less than 10
Liters. They actually consume whatever is under the line of the graph. In
order to this one should add the points of the graph this is how much oxygen
the person is consuming. (add x,y) so approx the area is 8L. The O2 deficit
is the area just outside the curve. The part above the curve that is still
within the rectangle
. The formula is O2 ReqO2consumed
… so 10
7.9=2.1. Recovery or O2 debt = is when you borrowed something from the
beginning and you have to pay it off. The longer the deficit the longer it will
take to recover.
Bike ergometer: if work load is constant, pedaling would take the same
energy. One can assume that the same amount of energy runs at minute 2.
At minute 5 one generates the ATP aerobically from 2L of oxygen. At minute
one you can generate that energy anaerobic because of the ATP
accumulated that one starts with “used right away” one uses the oxygen to
make glucose to lactic acid and at the end of exercise one has to go back to
resting at requires energy. Rest can be considered equilibrium and exercise
might be disequilibrium. At the end of exercise the body attempts to go back
to equilibrium and requires oxygen. The main point has to do with the size of
deficit. It takes more time to recover.
Another graph: Two groups of subjects doing same. One subject is
sedentary, one endurance individual, the middle line is the steady state for
the sedentary group. VO2 is
Measure of energy expenditure.
The
endurance line would fall under number 2 if they are doing the same amount
of work: No difference in steady state: “economy” in the stationary bike is
the same in running can be different. Endurance steady state is the very top
one: there would be a smaller deficit and would recover faster.
One thing: assuming you have exercised before
: if one does long
exercise, generally, when is the most discomforting? It is at the
beginning.
Because until one gets to steady state the body doesn’t adjust
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View Full Documentrapidly. Only holds for aerobic exercise. Then in steady state it would be
easier.
4 days different workloads
: below their max, monitoring their Vo2
1)300kgm/mm (steady state within one minute and no deficit) 2)600(would
take longer and lil deficit) 3)900, 4)1200(would take longer and would have
a longer deficit). Along these lines: a question: 1 mile: 1)1/4 2)2/4 3)3/4
4)4/4. Based on physiology, which one should be the fastest is between 3
and 2 and the slowest is the first one.
Vo2 Max: Best Objective measure of cardiorespiratory fitness. The best
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 Spring '07
 Girandola
 Steady State, VO2, Decompression sickness

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