Get a stop watch, I happened to use my cell phone's feature. Raise your left hand up all the way with palm facing inward toward your face. Press start on your stop watch with other hand. How many seconds do you get the first feelings of numbness? Keep holding up until a little while longer and bring down your palm and compare it to the other hand. Did it turn white? Repeat for right hand.

My left hand started getting numb in 10 seconds and my palm turned white in 20 seconds. My right hand started getting numb in 17 seconds and my palm turned white in 30 seconds.

What's your numbers?