I apologize to you all that do knuckle push ups and I called jokes. I recently started conditioning my phoenix eye (I love it). I found out that knuckle push ups work your hand muscles and I guess if it hurts and you work through it you gain a mental notch on the pain resistance meter,I guess

. Did I say I love this strike, it is the best thing ever. I don't know why everbody doesn't condition it. Your techniques will mean oh so much more, I mean they will hurt much much much more than any closed fist or palm strike. I currently hit my iron palm bag with the one knuckle fist.
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The ONLY ring that matters has curbs!
Train for the streets and adapt it to the ring, but NEVER train for the ring and expect it to work in the streets. These are two different states of mind!