Re: HSPUs - bands or decreased ROM
I've done both, and I prefer less ROM with an AbMat. I find that band assisted HSPUs are either way to easy (the band is too strong and I'm getting little benefit), or poor form (band isn't strong enough and I'm arching my back like crazy). It takes me too much fiddling around to find the right band resistance.
I feel like correct, lesser ROM with an AbMat is better at increasing my strength and leading to an RX'd HSPU.