Over the past few years my sensei has instituted a tradition of starting our kagami biraki class off with us all doing one thousand punches together. With each person counting off ten at a time, and novice students not being used to keeping the cadence for such drills, just going around and counting off 1,000 can be a challenge. At about one per second, it's almost seventeen minutes. Your arms get tired punching that long. If you're using proper form, your core musculature, your koshi, gets tired. Your throat gets sore from 1,000 kiais. Your brain wants to wander. It's a heck of a meditation. Read more