What causes vascularity or “The Pump”?
When training, muscle contractions cause blood vessels to dilate and also causes blood flow to increase. All that activity in the muscles causes them to expand.
This is why you often feel like your muscles look fuller, bigger and more appealing during/just after your session. Then, the muscles deflate later
Blood pumped into the muscles give them this expanded, fierce look, accompanied by prominent veins.
Now, not having a “Pump” doesn’t mean your not training hard enough and it doesn’t affect your overall progress. It purely depends on the type of training you are doing, what repetitions you are doing etc.
Muscle hypertrophy involves an increase in the size of skeletal muscle through growth in the size of its component cells. There are two different types of hypertrophy training: Myofibrillar and Sarcoplasmic. Myofibrillar refers to increasing the size of your muscle fibers, whereas Sarcoplasmic refers to an increase in the volume of fluid in your muscles. Sarcoplasmic hypertrophy is what creates this PUMP.
Sarcoplasmic Hypertrophy happens as a result of medium/higher rep training.
One supplement I would recommend to help with this would be PUMP HD™. This product contains Liposomal technology along with creatine and energy boosting elements like B12 to give you that extra energy and drive water to your muscles to create that extra PUMP!