So there is a chance this is just the lowest gear, the thing is what if you could click to a gear on a tenspeed called "fitness" that would represent the most fitness enhancing gear ratio. Also there could be gears labeled "cardio" or "strength training"

this is suggested as I read that cardio with strength training caused the greatest slimness. So a bicyclist, who might otherwise go for most pleasant ride could go for sveltification ride. Done right, it might be better than Spinning class.
-- beanangel, Jan 12 2017

Continuously Variable Transmission for Bicycles https://en.wikipedi...riable_Transmission
Relatively new, rather innovative CVT available for bicycles. [Custardguts, Jan 12 2017]

Being out on a real bike is ALWAYS better than a spin class.
-- neutrinos_shadow, Jan 12 2017


See my link for a relatively new CVT now available for bikes. It allows gear ratio changes under load.

So, using this, an electronic shifter (available), and a bicylce computer - you could set up the equivalent of an automatic transmission for your bike. [bean]'s idea then could be implemented into the program so that it optimises gearing ratio at all times for the result you want - whether that's constant output, constant cadence, etc etc.
-- Custardguts, Jan 12 2017


I was going to bone this because one ratio is not optimal in all circumstances, but with the CVT modification, it gets a bun.
-- notexactly, Jan 13 2017


// rowing machine ... going up hills //

"Sounds like a job for ... Surrealist Squad ! "
-- 8th of 7, Jan 13 2017


Just park your bike training device on an incline if you want to simulate a hill.

EDIT: But make sure to place it on a decline once you're finished. Letting all that potential energy build up inside would be a disaster waiting to happen...
-- Cuit_au_Four, Jan 13 2017



random, halfbakery