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  • Does anyone else have real problems with intervals at their supposed FTP? I know they're not supposed to be easy but I'm finding them impossible.

    Day 2 of Zwift's 4wk FTP booster includes 6x 45sec @ 175% (at 5 minute intervals). First one I can just about manage, second my legs give up shortly before the end, and the third I've abandoned by 30 seconds in.

    Don't think it's a case of the FTP being set unrealistically. Haven't done a specific test but have literally averaged it over an hour (also tallies pretty closely when extrapolated from my 20min averages). Whether it's accurate is irrelevant if it's the same equipment being used.

    Feels like a physiological thing where I'm not just suited to these sort of efforts, at least not currently. Dunno whether to persist with this one until my legs HTFU, or reduce the target so I can at least get through it. The latter feels like cheating.

  • 6x 45sec @ 175%

    I've never come across anything above 130% on TrainerRoad. Not suggesting that zwift is the problem but maybe not the best plans(?) - does sound like a crap workout for a generic build phase. These apps assume we have the same power curve, nothing wrong with adjusted to your ability. TrainerRoad normally has ranges or suggestions in the notes,

    e.g. Important: Try to settle on a demanding but repeatable power
    output such that you can finish as many intervals as possible. The
    goal is to accumulate a productive level of stress at a high level of
    intensity while avoiding the need to frequently quit intervals early.

    I would dial them back, better to complete all 6 at e.g. 150% than fail early on.

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