Palm cooling is a proven method for mitigating heat stress, increasing training volume, gaining strength faster, and improving aerobic endurance. It works by removing heat from your muscles. As you workout, your muscles heat up and this heat inhibits your ability to perform.
Our palms, along with the soles of our feet and cheeks, have special structures called arterio-venous anastomoses (AVA) that directly connect arteries and veins, and allow you to efficiently offload heat. In short, cooling your palms cools your blood, your blood runs through your muscles, so it cools your muscles, thus you can workout harder, longer.
Palm cooling has been studied on heat stress mitigation, strength training, bodyweight exercises, and cardiovascular exercise. Its ability to allow us to push harder is comparable to performance enhancing drugs… but without the negative side effects!
Feel free to geek out even more on palm cooling.