Thanks for the advice. I work them lots but it’s slow growing. It’s the slowest growing body part for me. The biceps and triceps. I have tried heavy, volume, drop sets, super sets, weighted dips...... patients is most likely what it will take to get the upper arm larger than the lower.
I see stone masons that look really off balance with how there bodies changed to adapt to there work. I am glad my issue is only my forearms.
Few suggestions if you are having issues with bicep and tricep growth:
For bicep training, start off with a movement that hits your brachialis (varying hammer curl movements), then move onto your normal movements, (preacher curl, barbell curl etc)
For triceps, start off with some higher volume work on pushdowns before doing heavier movements. Do a dipping movement too but I wouldn't recommend weighted dips for triceps, I would suggest dips between benches with as many plates on your lap as you can, taking your time.
Then move onto an explosive movement (look up JM press, this will be your best friend if you are having issues adding arm size on), then start adding band tension or chains to these movements.
Then finish off with something to stretch them out like some lying extensions.
Then alternate order of the movements on a weekly basis: do a bicep lift, then a tricep lift, and go back and forth until you've done all lifts. Then have a day where you superset a set of biceps with a set of biceps, then try a day where you do biceps first, then triceps.
Arm training doesn't have to be very scientific. Just train your brachialis to add to the illusion and make sure you're doing a dipping movement and some heavy fucking press for triceps and you're good.
Anyway this imbalance isn't that extreme and is to be expected from working a job that requires you to use your grip.