I use the backrest, helps me keep my form and use heavier weights. I managed 40kg dumbbell shoulder press on sunday for 8 reps.
People try to get an incline going because it means you can use your upper chest a little bit, dirty buggers!
Not really - atleast not for me. The weight in a squat is distributed across the back and down the spine, where as in a heavy shoulder press the weight is slightly more forward and non-static. That movement is the part that requires the lower back to constantly try counter balance.
Standing will also give your core a great workout. Use a slight bend in the knees when standing for the least amount of spinal compression![]()