I tried a new method of flat barbell benching yesterday. I watched a video that someone had posted on here about proper power lifting technique. I tried to mimic him as much as possible with the balls of my feet on the ground with the heels suspended and my back slightly arched. I went with a wide grip to focus more on my pecs. I kinda liked that is gave me more stability but it will take some getting used to. To make a long story short, lower back is sore as hell. As if I did back extensions all day. Did I have too much arch on my back?