I will tell you few things about depression, not from a professional perspective, as I am not a psychologist, but from a personal one; from my experience and from people close to me.
Nowadays the gyms are full with people with headphones on. There is no community spirit anymore. "Every man for himself!"
Some people have developed healthy habits, some have what we call "bad habits". In my opinion, bad habits are only the behaviours that affect us physically, mentally and emotionally and prevent us from having a normal life.
By encouraging my participants to donate clothes and food to charity or to people in need. We started by doing a single exercise for 4 minutes.