W/kg ranges corresponding to PPA road seeding

[dee_biker]

PPA Seeding: 9.14 - A

W/kg not close to some of these figures being thrown around!

Obviously a good wheelsucker?

[lechatnoir]

How did you get to 4.8 W/kg FTP? I had understood that FTP is ~80% of max 20 min effort, which assuming 343W is your max effort means you would have FTP of 4.15

Not saying you are wrong just interested in the calcs

 

95% of 20min max effort is the correct calc, not 80%

[devocean]

How did you get to 4.8 W/kg FTP? I had understood that FTP is ~80% of max 20 min effort, which assuming 343W is your max effort means you would have FTP of 4.15

Not saying you are wrong just interested in the calcs

 

I read in OP to take 5% off. So took 5% off 340W then divided by 66. So if it's supposed to be 20% off, then you're right, FTP will be 4.1 W/kg 

[Halfdoesyn]

I have no idea what my FTP is, but quickly plotting and fitting a power curve yields:

 

PPA Seeding = 4016.5 x (W/kg)^-4.641

 

Quite interesting...

[Spinnekop]

Never done a FTP test before, but based on a 343W avg for 21 min strava segment I estimate FTP at around 4.8w/kg (66kg), depending on how much cake I eat, which is a lot.

 

Best seeding index so far was 0.9 but that was purely based on a hill climb and not a race. Racing is completely different story. Usually I'm sitting mid pack in A bunch, or often straight out the back if there's wind!

You're doing 340w over 20min and weigh 66kg.

 

Not bad for a girl. 

[Kona Kula]

The seeding doesnt always work.

 

Last year I rode 94.7 in VA and started CTCT this year in 2nd group. But because CTCT never happened and because they degrade your seeding over time I am seeded D. My w/kg however are up as I have lost weight and done some good winter training.

 

anyway

3.7w/kg

PPA seeding current 18.44

Best aka last year 5,49 with a 3.5w/kg

[devocean]

You're doing 340w over 20min and weigh 66kg.

 

Not bad for a girl. 

 

Haha, was looking at FT column on the chart thinking jeez, not bad...until I realised i was looking at the women's section

[Jehosefat]

I have no idea what my FTP is, but quickly plotting and fitting a power curve yields:

 

PPA Seeding = 4016.5 x (W/kg)^-4.641

 

Quite interesting...

 

Why did you pick that functional form?

 

What something different like an exponential function? Could get a lower MSE with something like Seeding = a exp(b + c FTP)?

[Blue Monster]

Seeding usually between 10 and 15

Used to race AL, and finished in the top 3rd of AL at most races.  Currently racing VC.

At last FTP test 3.65W/kg.

I should be close to 3.8 to 4.0 W/kg by 947, starting VE.

2016 947 result 2:37 from VD

2016 CTCT result 2:56 from 1C

[Halfdoesyn]

Why did you pick that functional form?

 

What something different like an exponential function? Could get a lower MSE with something like Seeding = a exp(b + c FTP)?

Yeah, it just looked good on Excel

[J Wakefield]

Never done a FTP test before, but based on a 343W avg for 21 min strava segment I estimate FTP at around 4.8w/kg (66kg), depending on how much cake I eat, which is a lot.

 

Best seeding index so far was 0.9 but that was purely based on a hill climb and not a race. Racing is completely different story. Usually I'm sitting mid pack in A bunch, or often straight out the back if there's wind!

 

 

 

 

This right here is part of the issue I have with PPA and seedings.

 

Basing a seeding on power values is dangerous. Anyone can always put 1 all out effort in and get a great value. Anyone can. This value then does not always (hardly ever) translate into their bike handling ability or having to be able to produce that value over and over in a race when under pressure. This is when guys are outskilled for their seeding and way out their depth. 

Spinnerkop maybe not any more be a top level elite, but I would rather sit on his wheel in a gutter at 55km/h chewing bar tape than 96% of the A seeded riders at a PPA race. Purely from knowing how to handle a bike in that situation.

 

Devo: I am not in anyway bashing you, I am using your post as a example. I do wish you not out the back in the coming future. 

[Spoke101]

PPA seeding: 0.08 - 0.19

Start group: $/Elite

W/kg: 5.1

[J Wakefield]

There is another version of a similar table that puts ftp into race categories - search for it, it's been posted here before - this is more enlightening, but doesn't really match to SA based seeding categories.

 

Don't forget to adjust your ftp a bit for altitude if the test was not done at the coast - given that the numbers are all normalised to sea level ftp.

 

Why adjust it if you at altitude and done the test at altitude? The value typically is between 5 -10% between sea level and altitude dependant on your exposure to altitude. 

[Fat Boab]

This right here is part of the issue I have with PPA and seedings.

 

Basing a seeding on power values is dangerous. Anyone can always put 1 all out effort in and get a great value. Anyone can. This value then does not always (hardly ever) translate into their bike handling ability or having to be able to produce that value over and over in a race when under pressure. This is when guys are outskilled for their seeding and way out their depth. 

Spinnerkop maybe not any more be a top level elite, but I would rather sit on his wheel in a gutter at 55km/h chewing bar tape than 96% of the A seeded riders at a PPA race. Purely from knowing how to handle a bike in that situation.

 

Devo: I am not in anyway bashing you, I am using your post as a example. I do wish you not out the back in the coming future. 

 

 

I think you're a bit premature here John. The OP seemingly wants to test a postulate , namely "I'd like to glean a rough range of FTP/kg ranges that correspond to PPA seeding." With enough data supplied by contributors, I presume he can determine whether there appears to be a significant correlation, as some people have been determining on Excel already, or otherwise.

[J Wakefield]

I think you're a bit premature here John. The OP seemingly wants to test a postulate , namely "I'd like to glean a rough range of FTP/kg ranges that correspond to PPA seeding." With enough data supplied by contributors, I presume he can determine whether there appears to be a significant correlation, as some people have been determining on Excel already, or otherwise.

 

No, I understood his post completely (thought it was a good one at that) But this shows alittle how off some seedings are by the postings of values.

[V12man]

Why adjust it if you at altitude and done the test at altitude? The value typically is between 5 -10% between sea level and altitude dependant on your exposure to altitude. 

If you did the test at altitude, then you need to ADD 5 - 10% to your value before comparing to the values on the chart - this is called adjusting for altitude (of the test)

 

If you did the test at sea level, then there is no need to adjust the FTP value.

 

Personally I don't believe the 5 - 10% adjustment is that accurate - I suspect it may vary more or less from that by a considerable measure, and seems very individualised.