You'll still find that pushing to 95-100% FTP puts far more strain on the system. And pedaling at 70-75% FTP on the downhills is a long way from coasting. Also, if you assume a moderately hilly IM course with that kind of breakdown 95/70/58, you'll find yourself blown up on the run pretty quickly, unless your adaptation to running off the bike is unbelievable.
That'd work out to a fairly high VI, an intensity factor around .85, and assuming you're not a FOP racer on a hilly course, if you were racing the bike to a 5hr split, that'd put you comfortably over 400 TSS. That's a staggering load.
If you rode the entire course steady (assuming a bit of extra needed on hills) with 80-85% / 75 / 80, you'd see far better times, with far low impact on the system.
I'm not saying that TSS is the be all and end all of predicting run fitness, speed on the bike, or how your race will go, but its pretty often correct for the average athlete.
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Proud member of the GUCrew
Twitter: @tripigeon Blog: Ironpigeon.com
Thoughts on AG sponsorships / community involvement: http://bit.ly/1dQlVDy
That'd work out to a fairly high VI, an intensity factor around .85, and assuming you're not a FOP racer on a hilly course, if you were racing the bike to a 5hr split, that'd put you comfortably over 400 TSS. That's a staggering load.
If you rode the entire course steady (assuming a bit of extra needed on hills) with 80-85% / 75 / 80, you'd see far better times, with far low impact on the system.
I'm not saying that TSS is the be all and end all of predicting run fitness, speed on the bike, or how your race will go, but its pretty often correct for the average athlete.
-----------------------------------------------------------
Proud member of the GUCrew
Twitter: @tripigeon Blog: Ironpigeon.com
Thoughts on AG sponsorships / community involvement: http://bit.ly/1dQlVDy