People who are motivated to exercise do it before going to the Dr. The Dr is there to accompany you on your journey according to what you feel ready to do.

GPs adapt to the people who exercise and make sure they're recovering well and are finding balance

GPs adapt to the people who don't exercise and don't want to exercise, by doing brief interventions about its benefits but exploring other ways to be healthy that align with your goals

And GPs adapt to the people who don't exercise but need a paternalistic approach because otherwise they can't motivate themselves

Ultimately it's best to know yourself and your needs first and communicate to your GP how they can assist you in getting there