But that's schizophrenia, you were talking about depression. My fathers brother had schizophrenia, he died a homeless drug addict on the streets of Liverpool. My father had severe depression.
Despite your familial experience of depression you don’t seem to be very up to date medically. It is a well known and established scientific fact that exercise treats and/or eases symptoms of depression.
Exercise has always been recommended to lift people up, it's nothing new. Next time you hear someone who is contemplating suicide because of their severe depression make sure to tell them to do do an hour of cardio & they'll be fine.
It would help them. So I would recommend it to them.