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Old 12-28-15, 02:27 PM
  #22  
kkapdolee
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A follow-up question that relates back to my original question of how I cannot do 2 x FTP for 15 minutes:

Here are the relevant formulas I have.
NP = L4-normalization of 30 second mean power data.
IF = NP of a session / FTP
TSS = IF^2 x number of hours in the session x 100

Assuming I have my FTP down correctly, I can do no more than 100 TSS in one hour.
Assuming any NP, IF, or TSS under 20 min time is unreliable, let's say I do a 30 min sustained power session.
Maintaining a power output of sqrt(2) x FTP for 30 minutes should yield 100 TSS.
( (sqrt(2) x FTP) ^ 2 x 1/2 (hrs) x 100 ) = 100 TSS

But can you guys really keep sqrt(2) x FTP for 30 min straight?
Sqrt(2) is about 1.4 so if your FTP is 200w, can you maintain 280w for 30 minutes?

..

Actually, I guess if "not exceeding 100 TSS in one hour" is the only constraint, I don't have to do sqrt(2) x FTP for 30 minutes "straight". I can have rests in between. I could do a 10 minute ride, 15 minute rest, another 10 min ride, 15 min rest and the last 10 min ride for the same 100 TSS in one hour... But then, wouldn't keeping your bike computer on (autopause off) during rests lower your NP and you will have to do greater than sqrt(2) x FTP for each 10 minute ride?

I know I couldn't do 1.4 x FTP for 30 minutes straight but maybe I can do 3 ten minute sessions of 1.4 x FTP with 2 fifteen minute breaks in between. I'm still not sure about the affect of breaks on TSS.
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