80% max HR for 40mins sounds low though. Just getting your head around suffering on a stationary bike for so long can add a load of watts. Then theres pacing. The first 2 or 3 FTP improvements are basically free.
@Smallfurry started
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80% max HR for 40mins sounds low though. Just getting your head around suffering on a stationary bike for so long can add a load of watts. Then theres pacing. The first 2 or 3 FTP improvements are basically free.