Can you really do that? Essentially you are trying to Bonk. Only when I was a noob to riding for fitness and exceeding my FTP or Lactate Threshold for too long a time have I even come close to the thing that many refer to as a Bonk.

However all one has to do is slow down or shift to a lower gear ratio and continue to pedal. Only on a long steep hill where one doesn't have a sufficiently low enough gear ratio for their power output can I imagine one not being able to continue riding at some lower level of effort.

Bicycles are just too efficient for converting human power into linear motion.


When training to failure with weights... aren't you just lifting the same weight till you can't lift it any more? You could just take off some weight and continue lifting. Similar to shifting gears on a bike.

I suppose on a bike, with a PM, you could ride a a particular power until you can't maintain that power. And I do that quite a bit on the hills I try to best my time on. But when I can't maintain that power, all I have to do is slack off on my effort.