I am getting a bit confused with extension exercises, e.g. Back Extension and Glute extension. I don't have a specific machine, so I improvise using my normal bench to do it.
What is the difference between the two? Right now, I keep my body up to my pelvis on the bench and do the extension. Do I need to keep my lower back on the bench too? I think that will round my back, which I saw on the internet is bad.
Can you please advise how to do a correct back extension so that hip flexion does not come in to play?