You have more of a say than you realise. The key is to positively take control of your experience in any environment you find yourself, rather than let the environment take control of you.
Your body really is your temple. It is the vessel in which you experience whatever the universe has to throw at you. Ensuring you are treating yourself optimally really does maximise our enjoyment of absolutely everything.
What sort of exercise, how you exercise, when you exercise or if you choose not to exercise, they are all personal choices. Understanding what works for you is the best way to start. It really can be a life changer.
Your healing process is an intimate experience with yourself. It engages both the physical and mental sides of who you are at your core. It empowers you to persevere and succeed through whatever condition you meet.