This science is outdated and the fluid pressure inside the muscle DURING a workout is immaterial...muscles get bigger or stronger when? That's right at rest, when you're not training.
PS - There are some muscle groups that if I don't get some pump, I don't get bigger...
"...strength is built one recovery day at a time..." -OMP
"Do not change shit up during a training cycle." -Sandbox
Best PL total: 1020 - 350/265/405
Current total: 925 - 315/245/365