To develop that big flexor/pronator belly, you need to use wrist flexion. Really heavy wrist curls bother a lot of my lifters' wrists, so we usually go for sets of 8-plus and seek a pump rather than maximal strength.
Wrist rollers are better suited for heavy wrist flexion, and this version is especially challenging since the resistance increases as you roll.
Your doctor just told you to take six weeks off from lifting. Screwwww him and the Lexus he rode in on! Here's how to heal that blown shoulder or hamstring while still making progress!
Dan John is Testosterone's Yoda, wise as hell but with better skin and a heckuva' lot higher PR in the snatch than the original. However, our Yoda has had his share of Yodas to learn from. Read here as he shares his most valuable weight-lifting lessons.