I have heard various powerlifters on youtube to use the leg drive(1) and keep your shoulder blades tucked in or together throughout the rep(2) (just as we do on the low bar squats) while doing the bench press.
I am on stronglift 5*5, 22/M/58Kg/179CM, and as the weight is increasing gradually I want to learn how to use the legs as stabilizers on the bench press, even though I have them in correct position I am not able to generate any force with them.
Secondly, a common recommendation is to keep your hips glued to the bench, back arched and shoulder blades as tucked as possible to prevent unnecessary shoulder use, I have been trying this but it seems I loose this tension mid way. But today I noticed this all the more because I felt some abnormal sensation in my right shoulder (maybe the rotator cuff).
Please help me achieve 1 and 2 effectively.