Ever noticed those veins popping out when you're dialed in at the gym, or after an intense workout? That's vascularity in action, and if you've been pushing hard in the gym, you've probably wondered why some athletes have that enviable look of veins "splitting" across their muscles while others …

When considering what the best pump pre workout is, there are a number of factors to take into account. The "pump" occurs when fluid (mostly blood and water) is drawn into fibers as muscles experience hypertrophy from contracting it in high-volume resistance training. Arnold Schwarzenegger sa …