#1. Snatch and Clean Pulls + Shrugs: If you really want to improve the size and strength of your traps, just take up Olympic Weightlifting. Oly lifters have some of the most impressive backs imaginable. The sport is extremely technical however, and I wouldn’t suggest trying it without a coach; but clean and snatch pulls are a great start and extremely effective in making the trapezius grow.
#2. Dumbbell Rows + Shrugs on an Incline Bench at Varying Angles: The trapezius does more than just shrug – it elevates, depresses, retracts, and rotates the scapula, or shoulder blade. Performing the rows and shrugs at varying angles will ensure more of the traps are being hit – not just the upper fibers.
#3. Farmers Walks + Shrugs: Farmers walks are excellent at developing the core muscles, and so long as you are standing up straight with you your shoulder blades pulled back, your traps will take most of the beating.
There are plenty of other exercises that are effective at developing the traps, but these are 3 of my favourites – and from my experience the most effective. You must have noticed I add shrugs at the end of each move, and incorporate time under tension every now and again. I do this when I want to put extra focus on those suckers and I vary the reps from 3-8 depending on what I am pulling.