There is a saying that if you do physical exercises, you must do energetic exercises, but if you do energetic exercises, it’s not necessary to do the physical exercises.
Creating a muscle memory, so the positive practices that you have and the positive practices that you learn are remembered in every part of your being.
If your immune system is strong, you just don’t get sick. Of course I do all of the logical things like washing my hands, avoiding being in the wind, staying up late and eating a junk food diet.