Shocking. 
(It’s only been know since the late 1800s that RER goes up with increasing exercise intensity.)
Why does it rebound to higher than before the intervals? Or is that just because of the warm up?
Estimated fat oxidation? Possibly/probably retention of CO2 as the body attempts to compensate for CO2 “blown off” during the intervals.
Indirect calorimetry is an old, but still quite valuable, technique. Nonetheless, it has its limitations, especially when attempting to utilize it during non-steady-state exercise. In particular, the differing kinetics of VO2 and VCO2 can really put a wrinkle in things.
yes of course fat oxidation is immediatly super high after an high intensity effort lol xD xD
I don’t understand your joke?
(BTW, did you know that glycogenolysis shuts off almost instantaneously when a muscle fiber stops contracting? That’s crazy to think about when you consider the role of metabolites such as Pi and AMP in regulating phosphorylase and the much longer time course for restoration of resting levels, but it is in fact true.)
yep beceause there is a another superfuel source highly available in this certain moments and it is for sure not fat.
Again, I don’t understand your allusion.
no problem. its just easy imo, no way that fatox is high immediately after such a type of an effort
I didn’t say that it was?
I’ve found this quote from Alan Couzens quite useful:
Based on what I’ve seen to date, the ‘sweetspot’ intensity for improving aerobic capacity (assuming equal load) is right on AeT (first uptick), with an inverted U relationship falling off either side. Their isn’t a significant ‘cost’ to riding bottom steady vs easy & you’ll accumulate more load in a given time. I’d advise just trying to hover around this point, with some steady when you feel good and sticking to easy when you don’t.
I think it makes sense particularly for those time crunched who only have 90-120mins per day available.
The quote however raises the usual question marks around tempo and its effectiveness if we are to believe the inverted U.
I would bet the spot Couzens is talking about here is close to, if not exactly a corollary to what is known as the Lactate Balance Point … (of Steve Neal fame).
I have no scientific evidence of this … just an observation.
Every day you stick to your lower end z2 power is another day that you will be able to pack even longer SS/Threshold intervals on other days
No, it’s clearly far easier than that. The lactate balance point/lactate minimum is very close to maximal lactate steady state.
In any case, I wouldn’t trust Couzens’ scientific acumen/observational skills as far as I could throw him.
no, its not. See above for Cog’s explanation.
The other thing that Couzens will say is that you need to make time to do a lot of volume. If I had to pick a number from seeing his posts, at least 15 hours/week.
Honestly I think everyone would be better off listening to Empirical Cycling and Inside Exercise podcasts.
Is this true for everyone? What is the/your working definition of MLSS?
How far can you throw him?
There’s only one way to find out…
Empirical Cycling and Couzens are in agreement about volume. Couzens is a bit more precise about intensity. His Z1 and no harder whereas EmpCyc just says ride a lot , enjoy it and when you feel tired - rest. That’s my interpretation of the low intensity side of their advice