suishi,
when at work, he will go to his station gym if he got the time or go run with his coll.
on his off day, he will either go jogging in the morning or at night, if he is not tired. or at home, he has his little home gym, he will do his weights and crunches on his sit up bench. if i ask him, he will sure say he got exercise no need to do together with me.