Working out the on shoulders is painful and tiring task but when that workout ends it feels great! And it s no small feat to build shoulders that everyone envies so it will take time to see definite results. Ut believe us it will all be worth the wait. Don t know how to forge them? We are here with the words of wisdom on the science behind the phenomenon called boulder shoulders! Barbell push press Sets: 3 / Reps: 6 / Rest: 2 mins Step 1: Grab a barbell and hold it at shoulder height with palms facing forwards.