>>76579954
his psoriasis has nothing to do with training style.
You can pull and tear muscles doing any kind of resistance training.
Doing only machines can leave you with a very weak core, so you may throw your back out doing everyday stuff.
Free weights put a lot of extra strain on your spine, and can break your feet when they fall.
Bands can snap and blind you.
Medium- to high-rep calisthenics (not talking about the circus stuff some people do) is the safest kind of resistance training you can do.