It depends on what you do with the submissive. I had a session where the role play was that he would live the rest of his life in my cage. I told him I wanted him to be healthy so his life sentence would be longer and used rubber exercise bands connected to leather shackles on wrists and ankles. From there the possibilities for exercise are many. Lat pull downs, chest presses, squats on a dildo, one leg stands while wearing heels, etc...
Mistress Lisa
Lisadomina website