Even better, keep your arms on the side of your trunk, your elbows straight and flex your hands at 90 deg so they point away sideways. Now, move your shoulders

Even better, keep your arms on the side of your trunk, your elbows straight and flex your hands at 90 deg so they point away sideways. Now, move your shoulders up and down. Don't use any other joints. Each down move of the shoulder will pump blood into your hands with high pressure. We call it the penguin dance.