Plate turns/plate rotation is a great exercise to improve your gyaku techniques

[@EB-mu9ex]

I think twisting with a band wrapped around a stationary pole would be better. Because if you’re using a plate there’s inertia on the follow through and you end up having to try and control yourself from twisting too much. With a band you can use as much force as possible without having to control the follow through.

[@quirinzangl4693]

Same effective and even more pectoralis: heavy kettlebell

[@brushzaid2484]

He's not doing the same motion though.