Riding in the "aero" position in the spinning program is a contraindicated movement.

Resting your weight on the indoor cycle's handlebars will isolate your upper body and put strain on your low back. Throw in a little neck pain too.

An indoor bike doesn't have any "give" and doesn't "move" with us. Don't try to make it more complicated than it has to be. Three hand positions, five movements. If you're doing anything more than that you're doing it wrong and putting your riders at risk for injury.