Fatigue More Condition_symptoms In Building Muscles, Which Is More Important? Increased Bloodflow Or Muscle Fatigue?

In building muscles, which is more important? Increased bloodflow or muscle fatigue? - fatigue more condition_symptoms

Some exercises to provide a pain in my muscles. Not only pain, I mean PAIN! I remember the feeling as it was my first time on the bench. My pectorals were devastated! But only some of the exercises will give you a pump "good" muscles. This is usually on when my veins start Outta Poppin 'nowhere. Obtain a rule, a very painful feeling when I exercise plateau-busting exercises, such as high volume or high intensity. But some exercises just gives me a good pump. It is more important?