A follow up to yesterday's tweet on how we can use nose-breathing to identify the right intensity...
Where most athletes get it wrong...
A brief #physiology thread
Where most athletes get it wrong...
A brief #physiology thread
As we continue to increase the intensity of exercise after moving from nose breathing to quiet mouth breathing, eventually we encounter a second breakpoint in ventilation - the transition from quiet mouth breathing to loud mouth breathing...
At this point, metabolic acidosis is starting to increase and the body's response to it is to "blow off" the increasing carbonic acid in the form of additional CO2...
This is directly visible in the relationship between VCO2 (the amount of carbon dioxide being produced) vs VO2 (the amount of Oxygen being consumed). At this point in the test the CO2 line takes a turn & begins approaching the O2 line.
Additionally, the ventilation also makes a sharp increase, however *the respiratory rate doesn't significantly change* &, in some cases will actually decrease!
i.e. this is another situation where the athlete doesn't breathe noticeably *faster*, but noticeably *deeper*.
i.e. this is another situation where the athlete doesn't breathe noticeably *faster*, but noticeably *deeper*.
It's a different type of 'deeper', however...
In our last transition from nose breathing to quiet mouth breathing, we had an urge to breathe *in* deeper. This time, the body's urge is to breathe *out* deeper - to breathe out the increasing acidity of the muscles and blood.
In our last transition from nose breathing to quiet mouth breathing, we had an urge to breathe *in* deeper. This time, the body's urge is to breathe *out* deeper - to breathe out the increasing acidity of the muscles and blood.
Many athletes wrongly identify this transition as the first ventilatory threshold and spend far too much time at this acidic, carbohydrate costly point, when there is significant benefit to be had far below it, at an intensity level that is "through the nose".
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