A modern smart trainer will continually vary the resistance level based on software cues to simulate inclines, head/tailwinds and the effects of drafting. If yo

A modern smart trainer will continually vary the resistance level based on software cues to simulate inclines, head/tailwinds and the effects of drafting. If your Zwift ride arrives at a steep climb, you'll need to downshift and get out of the saddle to keep up, just as you would do in the real world. Peloton has a mechanical knob that controls the resistance. It's clear that a lot of people love the Peloton experience, but it's a pretty lousy training tool for any kind of real cycling.