remerge 'split' rides; aerobic decoupling

[Darren Linkin]

1) is there a way to recombine/merge split rides other then redownloading the original file. I misunderstood the split marks while trying to split out a preset interval to look at the aerobic decoupling for that one interval. I don't need to recover a particular file (I also have it saved elsewhere) but if there is a way to do this in GC that would be easier. Looking at the files in the folder, the raw.bak file must be the whole original file, and the '.gc' files must be what was split up. So if I just delete the 'gc' files and leave the raw one from that one date would that do the trick? 2) aerobic decoupling: very cool, though very sensitive to messiness in rides, it seems. I would guess that the most reliable (consistent between rides) way of doing this would be to do it for specific intervals. So show it as an interval measure as well as an overall ride measure? When I split the above ride it ended up cutting off the pre-interval part but not the post interval slowdown, and the 'decoupling' went from 16% to 30% (!). There IS significant decoupling on that interval...I maxed out smoothing to get a better sense and and there is a decrease in power @ 7 watts with stable heartrate from beginning to end (yeah my LT hr is high...around 180)...screenshot attached. this ride interval after warmup was 90 minutes of z3, with 30 second spinup in same gear to z5 at start of every 5 mins). However it also still has the 'tail' part when I went to z1. I wonder if having that z1 part makes it look worse since that becomes part of the calculation of the 2nd half of the ride, and the heart rate takes a few minutes to come down while the power is low, making the power/hr for the 2nd half falsely low (as a measure of decoupling). Would be nice to compare similar intervals across different workouts over time to see decrease in decoupling (which I think is the overall intent). 

[Sean Rhea]

Darren,

#1: Yes, if you just remove the two .gc files, move the .raw.bak to a
.raw, and restart GC you'll have the original ride back. There's no
way to do this from within GC yet, though.

#2: Open up the Preferences Dialog, select the Interval Metrics pane,
select Aerobic Decoupling under Available Metrics, click Include, then
Save, then Close. Now all your intervals should show Aerobic
Decoupling.

Sean

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[Darren Linkin]

Great...thanks!
d

[Darren Linkin]

Sorry for double email, but the results of looking at decoupling by interval instead of overall ride are huge and I wanted to share what I found.

So for the whole training ride in question..all on a trainer doing one 'interval' with a warmup and cooldown (1:56 total ride time), my aerobic decoupling was 16%.

When just looking at the 1:31 (hour and 31 min, just cutting out 25 minutes of warmup/cooldown) 'interval' I did, the aerobic decoupling is now 3% (!). So...#1 does this mean I'm an aerobic animal (i.e., very aerobically fit at least for my current threshold...not that I have a high threshold)? But more importantly, #2, this may be an importantly finding for those like me unfamiliar with how the coupling parameter works...somewhere in documentation mentioning that it can fluctuate wildly and is best evaluated in a (steady state?) interval that excludes warmup/cooldown periods?

Darren

Begin forwarded message:

[Sean Rhea]

I think it means your HR took a while to rise during the warmup, and
it stayed high (relative to power) for a long time after you finished
the interval. It probably also means you stayed exceptionally well
hydrated, and that the interval power was well within your "endurance
pace", whatever that means.

By definition, you can't do a 91-minute interval at FTP, since your
FTP is your mean maximal power over 60 minutes. And if you were doing
a 60-minute interval at FTP, I'd expect a lot of aerobic decoupling.

Sean

[Darren Linkin]

Oh, yeah I didn't mean to imply that was my FTP. I'm estimating my FTP
to be 250, so this 220 (avg) interval was high tempo overall.

Darren