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Watt output to calculate FTP?
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RBeck
Aug 3, 15 9:41
Post #1 of 8 (1293 views)
With being relatively new to triathlon < 1 year, just wondering if you can figure out your FTP if you take power data from my most recent race.

My understanding of FTP is max power over one hour. In my newb way of thinking, I should be able to translate the watts into a rough FTP since the bike was longer than an hour. Does that make sense or am I completely off base? If it is within the realm of reason, what would a rough FTP # look like for me? Data below...

25.8 Miles - 1:11:35 - 221w Weighted Avg Power 933kj and I weigh 134lbs (not sure what data is helpful here)

Any advice/insight is appreciated.
Last edited by: B3CK: Aug 3, 15 9:42
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Re: Watt output to calculate FTP? [B3CK] [ In reply to ]
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sciguy
Aug 3, 15 9:48
Post #2 of 8 (1274 views)
B3CK wrote:

25.8 Miles - 1:11:35 - 221w Weighted Avg Power 933kj and I weigh 134lbs (not sure what data is helpful here)

Any advice/insight is appreciated.

Was this done as part of a triathlon or just a bike race? If a triathlon how well did your run go? What ever the case, your FTP is something over 221w.

Hugh
Genetics load the gun, lifestyle pulls the trigger.
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Re: Watt output to calculate FTP? [B3CK] [ In reply to ]
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g_lev
Aug 3, 15 9:56
Post #3 of 8 (1260 views)
This isn't really terribly helpful since I am assuming you swam 1500m first and then ran 10k. So clearly you didn't put out your max effort for that 1:11 (otherwise you wouldn't be capable of running afterwards). Also you can't use NP or strava's "weighted average" to calculate FTP - you need actual average power.
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Re: Watt output to calculate FTP? [sciguy] [ In reply to ]
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RBeck
Aug 3, 15 9:57
Post #4 of 8 (1258 views)
Well, my best 10k that I've documented is 47:52 (7:40 Pace), I did 8:27 pace for this 10k. It was brutally hot though, so I don't think I killed myself on the bike, albeit, took me longer to get my legs under me.
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Re: Watt output to calculate FTP? [noofus] [ In reply to ]
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RBeck
Aug 3, 15 10:00
Post #5 of 8 (1254 views)
217 was that number I believe.
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Re: Watt output to calculate FTP? [noofus] [ In reply to ]
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RBeck
Aug 3, 15 10:03
Post #6 of 8 (1248 views)
Gotcha, that's why I was asking, wasn't sure if it could be tabulated or not via these metrics without actually doing an FTP test. Thanks
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Re: Watt output to calculate FTP? [B3CK] [ In reply to ]
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rcmioga
Aug 3, 15 10:32
Post #7 of 8 (1199 views)
I'm going to guess you're in the 240-250 FTP range. There are a variety of different ways you can test (20min and 95% of recorded power) and if you did without the swim/run, I'd bet you'd be about 10% higher than you did in the Tri. At 250 watts you'd have a P/W ratio over 4, which in my experience means you're at the pointy end in most local races....
Randy Christofferson(http://www.rcmioga.blogspot.com

Insert Doubt. Erase Hope. Crush Dreams.
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Re: Watt output to calculate FTP? [B3CK] [ In reply to ]
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karlw2000
Aug 3, 15 10:33
Post #8 of 8 (1199 views)
Since it's recommended you do an Olympic Tri from 85-95% of FTP, you could always estimate your FTP, but it would range a bit.

I myself had measured my road FTP @ 220 watts and last year did my best Oly @ 188 watts (NP 202 watts) and had enough left for a decent 10k. I weigh 128 lbs and had a 1:08:25 on a 25.07 mile course that wasn't too hilly, but not exactly flat either). 188 watts is 85% of my FTP at the time.
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