Generally, how long does it take to grow major parts like the brachioradialis or the flexors. I've been doing reverse curls and hammer curls intensely to failure for like 2 months, and it's gotten a bit bigger, but not where I want it to be. Also another question, as time progresses, how often should I be increasing the weight? I know it's whenever I'm doing too many reps, then increase the weight, I know that. I mean like for example, adding a pound to the barbell every week, what kind of progression should i try to do? So far it's been really hard to add more weight, whenever I try to push I can barely get 8 reps in. My protein is always above 100g a day and I get about 7 hours of sleep. And for the training I always feel a huge burn, and at the end of sets I can barely do more. Lastly, what weight do you guys use for wrist curls? What was this like compared to when you started, and what was the increase in weight with respect to time?

To get forearms that are well developed, with large protrusion giving the "disproportionately large" visual feature, how long does this tend to take? I've heard online people say it's the most stubborn muscle group, and can take years, is this true for any of your experiences? For me, I've been training my forearms mostly 5 to 7 times a week for 5 months. They have grown a little, mostly the flexors and brachioradialis, but the growth is not that impressive. Relatively, it's just about proportional to the upper arm.