So I'm on 'whopping' day two of my brand new workout, and I'm feeling this awesome burn in my arms and chest (and hopefully my back by tomorrow morning). Whenever I go to the gym, I stretch for maybe 5 minutes before I begin my workout.. nothing serious, just like my arm over my chest/behind the back and stuff, but nothing that would actually make a difference.
My question is, would it make a noticeable difference if I stretched, say, 15 minutes before and after my workout? If so, what stretches should I be doing?
(My workout is completely upper body, with calves every 3rd day)