First, though, a disclaimer: like all fitness advice, this isn’t actually universal. You may have particular health issues or physical disabilities that prevent you from doing these exercises, and that doesn't mean you can't stay fit with exercise. Perhaps your mobility isn’t very good or you have an old injury that acts up. Or maybe you just have a weakness that you need to fix, but that will make the exercises outlined below impossible in the meantime. We’d always advise that you talk to a professional trainer about your body’s nuances to get personalized recommendations.