How to survive long sweet spot intervals?

For clarity, despite TR pushing the Ramp, it is suitable to use any of the common FTP test protocols to set your FTP for training.

The reason these mater is that the Ramp test can sometimes give incorrect FTP values for some riders. It can make workouts harder (just like you describe) because it may have yielded an FTP that is not appropriate for you. Those other tests may well be “better” for you in the sense that they might give you a more accurate FTP that applies to the TR workouts.

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