I have this list of more than 2000 different types of exercises that can be done for fitness purposes.
Say each time I go to gym (3 times a week), I randomly select 12 items from this list. Completely random.
What negative and positive effects this might have on my body?
What I'm asking is what happens if we simply get past traditional workout routines which are written by trainers and should be repeated for a while until we get new routines. I want to know this practice is just a traditional practice being around that can be changed, or is it something backed scientifically.