No, because the pump isn’t necessary for growth.
I thought that saying disappeared in the '80s. Like wanna_be already linked to, DOMS isn’t necessary for growth, either. You can jump rope for 10 minutes barefoot on concrete and your calves, shins, and ankles will be in a world of hurt, but you’re not getting more benefit than if you hadn’t made pain the goal of training.
Fair point. I don’t remember Skyz starting any essential reading like What Should I Wear To The Gym?
No, but aim for a half-hour or less…