Shrugs work best in the 8 to 15 rep range for 3 to 4 sets, since the traps are a dense, resilient muscle group that responds well to higher volume and shorter rest, 60 to 90 seconds, between sets. Progress with straightforward weight jumps once you can hold a two second pause at the top of every rep, and consider using straps once grip becomes the limiting factor rather than the traps themselves. Program shrugs near the end of a pull or back day, after your rows and pulldowns, since fresh traps aren't required the way fresh pulling strength is for a deadlift or row. Avoid rolling the shoulders through the movement; a straight up and down path keeps the tension on the traps and off the rotator cuff.
Should I roll my shoulders at the top? No, rolling adds no extra trap work and puts unnecessary stress on the shoulder joint; a straight vertical shrug with a brief pause is all you need.
Why does my grip give out before my traps? This is common once the weight climbs past what your hands can hold; straps let you keep training the traps past your grip's limit on heavier sets.
Is it bad if I can't feel my traps working? Slow down the tempo and add a real pause at the top; rushed reps with momentum are the most common reason lifters don't feel shrugs in the right place.
Log your barbell shrug sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.