tarzanusa said:from what Ive heard...it is from the increase in mass and the amount of blood needed to support it. Also, your arteries need the time to extend and support the new muscle/mass. Your muscle tissue needs alot more blood to support its new size.
I have the exact thing...but it did not start until I started putting on weight. It is very annoying.
Thats the best answer I've heard so far...