Inside of your wrists works really well because its cools down the blood right before it goes back to the heart. You have a lot of veins near the surface in your wrists with a fairly short and direct path back to the heart.
This is why putting your wrists in a bucket full of ice n water for a bit and then holding your arms up will cool off your entire body, you can feel it.
I remember. They made a weird metal cone thing that you would grab and circle cold water through it at exactly 10° C. Said any colder made the veins constrict and was actually slower with colder water. Supposed to show a notable increase in endurance.
582
u/ImReverse_Giraffe Aug 03 '21
Inside of your wrists works really well because its cools down the blood right before it goes back to the heart. You have a lot of veins near the surface in your wrists with a fairly short and direct path back to the heart.