Think f health as a triangle, one side is ohysical, social, and mental. You need to tend to all sides equally to help the patient, but in this situation the mental health is fine by it's self you so just need physical and social needs. To help the patient with this, you need to first help the patient with a workout plan. A gym membership, anything that might motivate them to start working out. And, you can some how add socail to that. You can do marathons, run with friends, etc. But, that won't fully fix social health so you will want to get your patient out there, maybe going out more or just small talk with strangers ( BE CAREFUL WITH STRANGERS ) but really getting your patient out there is the key to fixing social health.
REMEMBER:
You need all 3 sides to be healthy. Each side needs to be equally cared for if you want your patient to be healthy.