My veins why do they pop out after working out?

I noticed that ever since I have started to workout really hard, some veins that I have never seen in my arms are there and they are sort of popped out. Why do the veins pop out and why are they there?

Answer #1

Your veins will stick out for a couple of reasons. First, it’ll allow more blood to flow through them back to the heart, secondly, cutaneous veins (those just under the skin) are a good way for the body to lose excess heat and prevent overheating. By sticking out, there’s a larger surface they can lose heat from, so it aids in cooling during excercise.

Answer #2

workin em hard, dont over do it!

Answer #3

Yea, but why??

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