This is probably one of those "well, DUH" things, but I'm gonna ask anyway. I've been doing some reading about biking, and one thing that grabbed my attention is that we're "supposed" to have a cadence of 85-100 - each foot going through a full 100 revolutions per minute.
Why is this considered an optimal range? The only thing I can think of is torque, where I'm in a high gear and not pedaling as fast but doing a bit harder pedaling causing me extra work, whereas a lower gear and faster revs may not be as much work. Is this the point? Or what am I missing?