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bridgy

Legendary Member
Location
Cheddar
Before this ride Zwift Power had me as A cat with a ZRS of 599, now with a ZRS of 951 I am a B cat.

Yeah that's crazy isn't it! As I said the ZRS thing is perhaps understandable as it's picked up on the huge jump in 5/10 minute power and increased your seed score accordingly (I assume).

Going from A to B Pace Group Category after that ride is nuts.

In this case I think ZRS has it right and the Pace Group Category is showing how flawed it can be (based on those power numbers which may not be right, but the category systems don't know that)
 

Legs

usually riding on Zwift or up steep hills...
Location
Staffordshire
1774359673972.png

To put that into perspective, @Venod, you rode for 14 minutes at a power 10% higher than the top <0.05% of 70-79 y.o. males can sustain for just 5 minutes? Definitely fishy!
 

Venod

Eh up
Location
Yorkshire
Yeah that's crazy isn't it!
It is, just looked at my profile in Zwift Companion and it has me as A cat, the result of that ride is not very realistic, but to get zrs down to a score I am happy with will take ages, this the chart from the ride, the TT ends at the first big dip in my HR.
Screenshot_20260324_134739_Companion.jpg
 
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ColinJ

Puzzle game procrastinator!
Are those cadence figures accurate? It almost looks like they are doubled! (94 average is okay, but 144 looks very high.)

Maybe you just spin really fast? If not, then the turbo thinks that you are pedalling twice as fast with a given force, and that would double your power figures.
 

Venod

Eh up
Location
Yorkshire
Are those cadence figures accurate? It almost looks like they are doubled! (94 average is okay, but 144 looks very high.)
Yes they are right, I am a bit of spinner nowadays, I find it easier to produce higher watts this way on the turbo, and the chart is for the whole, I wouldn't be surprised if the cadence for the TT section is over 100rpm.
 
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Venod

Eh up
Location
Yorkshire
It looks as if he got a new trainer last December. Is it an Elite Suito?
No its a Stages SB20, I have had it a couple of years, I have compared its accuracy with some Assioma pedals, while not identical they were not far off, I have just put them on my outdoor bike, I think another comparison is needed.
I was knocked off last August resulting in a four days in hospital with a fractured skull, I have been on Zwift 5 or 6 days a week since then, this can be attributed to a rise in my zrs score, but todays figures are a bit insane, I have achieved some good results in the Strava 70 to 75 year category but there are people quicker.
 

bridgy

Legendary Member
Location
Cheddar
No its a Stages SB20, I have had it a couple of years, I have compared its accuracy with some Assioma pedals, while not identical they were not far off, I have just put them on my outdoor bike, I think another comparison is needed.
I was knocked off last August resulting in a four days in hospital with a fractured skull, I have been on Zwift 5 or 6 days a week since then, this can be attributed to a rise in my zrs score, but todays figures are a bit insane, I have achieved some good results in the Strava 70 to 75 year category but there are people quicker.

You might be able to request Zwift discard that ride from your stats and put your ZRS back to where it was, on the basis the power numbers are definitley dodgy for whatever reason. As you say, if that's left to stand, your

Is there some sort of calibration process you can do with the Stages SB20 perhaps?
 

Legs

usually riding on Zwift or up steep hills...
Location
Staffordshire
280W FTP (at 70kg) would put you amongst the very best 70+ cyclists in the world. My current intervals eFTP is 3.77W/kg, which would rank at 98.7th percentile for M70-79 - 4.0W/kg must be beyond 99.5%. Do you feel significantly stronger than early last year when you were achieving ~200W in races?

416W for 14 minutes is patently ludicrous.

I'd second what @bridgy suggests about Zwift voiding that ride in particular.
 
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Venod

Eh up
Location
Yorkshire
I have seen a test you can do by hanging weights on the crankarms, looked a bit Heath Robinson to me, I think the first test is another comparison with my Assiomas, but then we have the old saying, a man with one watch always knows the time, a man with two watches is never sure, but is it the correct time ?
 

bridgy

Legendary Member
Location
Cheddar

Venod

Eh up
Location
Yorkshire
I can assure if it is Sticky Watts its not intentional, this trainer has significant lag from what's happening at the crank to what appears on the screen, admittedly I don't have a very smooth constant pedalling action, I will occasionally put in very high cadence efforts to boost power and the power on the screen does not immediately drop, but it doesn't instantly increase when I put in an effort, so its swings and roundabouts.
 
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