Riding out I would typicaly pick myself out of the saddle on climbs and move around. With indoor cycling I do that a lot less. My wheel on trainer was ok for mimicing that, but now I have zwift. I am training for a triathlon in a few months so I have a triathlon saddle, aero bars and Zwift gives me ERG mode. That means that I can be in riding to arround 90rpm with the trainer keeping the power constant for 90min at a time, and my back side planted.
Do you folks suffer from saddle pain on rides like this? what do you do to get around the pain. numbness.?