I used to. I followed a book, you have to do it EVERY OTHER DAy YOR MUSCLES do remember, change your routine, or do upper one day and bottom the next like I did or you won't bulk up.
Muscles remember and get used to the same thing all the time then they don't expand good.
Weights changed my physique somewhat permanently I have bigger arms now even when i don't lift.
Even though I hate it I can say EVERYONE should do it a bit, it changes you...revs metabolism so you use calories more efficiently
Right now I do so much yard work I don't really need to.
I have a weight machine and free weights in my basement.
did the weights for my upper and skate/bike for the lower for years and I was huge. Kinda masculine even. I never thought it could happen to me but it did/does.