12/31/2020
Two ways to do a back fist for sparring.
1. Lunge with front leg
2. Lunge with rear leg.
The first method will work and takes less coordination. But if learn how to lunge with the rear leg and develop the timing, you will have explosive flying backfists that you can launch fro across the mat.
Credit: GMQ and Master Bao showed me this years ago in Gainesville and I love it.