Long ago, my original training was as a biologist, and I'm afraid there have been a few things posted on this thread which I don't recognise as being "generally held as correct". I'm not saying they are wrong, I'm saying I don't recognise them as being stuff which is generally held to be true.
I would be interested to know where the posters information comes from.
NATURAL ANKLING wrote:.........
High cadence is high power output but is limited in hours.
Lower cadence means that a higher proportion of body fat is used compared with carbs which is limited with no food intake.......
I don't think either of those statements is necessarily correct. You can turn the pedals quickly but with very little force, or you can turn them slowly with great force. I wrote a bit about fat and carbohydrate metabolism here https://forum.cyclinguk.org/viewtopic.php?f=1&t=87870&p=1228590&hilit=glycogen#p1228590....I can't provide references, but its stuff that (I think) most students of biology would recognise.
althebike wrote:.......... I notice with Froome he does not high spin all the time, he does drop to 80-85 every now and then which changes the muscle fibres he uses and so helps his legs against fatigue.
Again, I'd like a reference, please.
A few seconds Googling found this.....https://www.ukopencollege.co.uk/myfiles/file/Anat&phys4.pdf, which says that fast twitch fibres use anaerobic glycolysis....Froome can't be using anaerobic glycolysis most of the time, your body simply doesn't work like that.