<\/p>\n
I was just told yesterday that I have to do a short lecture on Friday
\nmorning at work over complicated exercise testing. All four of us have
\na different aspect of testing that we are covering. I get the pleasure
\nof covering CO2 production and minute ventilation.
\nSome people have wondered what I do now in my new position at
\nChildren’s so you can have some kind of clue as to what I do in the
\npulmonary physiology lab (a recent name change of the lab) here is part
\nof what I will be talking about on Friday:<\/p>\n
CO2 output (VCO2) during exercise is determined by factors similar to
\nthose that govern O2 uptake: cardiac output, CO2-carrying capacity of
\nthe blood, and tissue exchange are major determinants. However, because
\nCO2 is much more soluble in tissues and blood, CO2 output measured at
\nthe mouth is more strongly dependant on ventilation that on VO2 (oxygen
\nconsumption). In addition to this, because dissolved CO2 is a weak acid,
\nthe body uses CO2 regulation to compensate for acute metabolic acidosis,
\nwhich affects the pattern of VCO2 as work intensity increases above the
\npoint of anaerobic metabolism…….During progressive exercise VO2
\nincreases nearly as much as does VO2 over the lower work rate range,
\nwith an average VCO2-VO2 relationship of slightly less than 1.0. It
\nshould be recognized that the slope of the VCO2-versus VO2 relationship
\nis not equal to the respiratory exchange ratio, as the relationship
\nusually has a small positive intercept on the VO2 axis…..VE has been
\ndemonstrated to be closely proportionally coupled to VCO2 during
\nexercise, it is useful to analyze Ve in relation to VCO2……<\/p>\n
So what are your thoughts on this?<\/p>\n","protected":false},"excerpt":{"rendered":"
I was just told yesterday that I have to do a short lecture on Friday morning at work over complicated exercise testing. All four of us have a different aspect of testing that we are covering. I get the pleasure … Continue reading