oxygen deficit

[shademaker]

Is oxygen deficit purely the absence of oxygen in the onset of physical activity? Lets say during a 5000m run you started running at like 95% Max HR intensity, would the duration of that sprint also be classified as oxygen deficit?
All this questioning began when i read a question asking whether a 200m sprint or an 800m run had the bigger oxygen deficit and the answer was the 800m, which i was thoroughly confused at.
Any help here would be appreciated
thanks

[melaniej]

As we begin to exercise, there is a period of time where the body’s oxygen demand is greater than the supply of oxygen. The cardio-respiratory system cannot act quickly enough to satisfy 02 demand. This results in an oxygen deficit. The amount by which the 02 supply fails to meet the demand represents the oxygen deficit. Whilst the deficit continues, the body must obtain ATP resynthesis through the anaerobic systems.


This deficit would be greater in the 800m as they are working for longer (200m over before the aerobic system becomes dominant at 75 seconds) and anaerobic systems are still contributing throughout the race but at a lesser extent.
So pretty much, the longer the activity, the greater the oxygen deficit. Especially 800m as it is a max race, even though they aren't working anaerobically the whole time, its still a full on race.

Hope this clears things up...

[shademaker]

im pretty sure the 800m isnt run at maximal intensities. It actually says that in the answers as well for the next question so thats why i was confused. Cuz if it is a maximal event then yeh it obviously does have a greater deficit but i would think the first like 400m would be run at just below LIP

[akkxn]

so what about 800m vs 10,000m?

I'm guessing 800m, because the 10,000m race is mostly submax, not surpassing LIP and therefore not significantly using the anaerobic systems for energy production... even though the 10,000m is the longer event...