Eric Fattah mentioned in a recent post something to the effect that the metabolic path for fats and proteins used o2 at 70% the rate of the metabolic path for carbohydrates (I presume that this is per unit of energy produced). Since we have a lot of physicians, physiologists etc. lurking around here, I was hoping someone could help unravel this.
I did find that fats and proteins cause a reduction in Respiratory Quotient, where RQ=(CO2/O2)/unit_time, the reason being that lipids and proteins are less oxidated and therefore require more O2 per mole of CO2 generated. In fact, the RQ was as low as 0.7, which matches the 70% figure that Eric mentioned (RQ for metabolizing carbohydrates is 1.0)
RQ itself does not seem to be any kind of indicator for how long you can go w/o o2, but it seems reasonable to think that it might be tied to respiratory drive -- lowering the rate of C02 production should prolong the amount time that you can tolerate apnea. I realize that this is a ratio here, not an absolute rate, and that RQ says nothing about the rate of Co2 production per se, but the whole topic made me wonder about a few things.
I did find that fats and proteins cause a reduction in Respiratory Quotient, where RQ=(CO2/O2)/unit_time, the reason being that lipids and proteins are less oxidated and therefore require more O2 per mole of CO2 generated. In fact, the RQ was as low as 0.7, which matches the 70% figure that Eric mentioned (RQ for metabolizing carbohydrates is 1.0)
RQ itself does not seem to be any kind of indicator for how long you can go w/o o2, but it seems reasonable to think that it might be tied to respiratory drive -- lowering the rate of C02 production should prolong the amount time that you can tolerate apnea. I realize that this is a ratio here, not an absolute rate, and that RQ says nothing about the rate of Co2 production per se, but the whole topic made me wonder about a few things.
- Are you more likely to black out when you're using lipolysis as your primary energy source?
- Are you likely to pull off the best statics in the morning, since most of your energy is coming from lipolysis (and you're metabolic rate is low)
- My understanding is that ketosis lowers metabolic rate amd it wouldobviously lower RV, so is it desirable to get into ketosis before doing statics?
- I guess that a carb-heavy diet would increase respiratory drive and be bad for statics?
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