I have serious problems isolating my biceps. My forearms usually

light weight sit down on a bench and do supinating curls

also you probably just think youre using your forearms because they hurt youre using too much weight and its hard to hold idk

This is literally why preacher curls are a thing.

>>40198236
Stop curling your wrists at the top of the movement. Keep your wrists totally straight.

Personally, I feel like I'm really hitting the peak hardest when I let my wrist go somewhat limp. But I have really long arms.

>>40198261
Had the same problem as you OP, was going to say this. You'll think you can curl way more, then you get on preacher curls, and see how weak your biceps really are lol

laying down cable curl

It'll probably get people looking at you but it isolates biceps since you are only pulling and there is no gravity pushing you down to force your forearms.

trust me nigga

>>40198236
Same boat OP. I tried seated bicep curls, worked for about 2 workouts then nothing after that.

>>40198960
>laying down cable curl

this is some cross-fit level shit

File: ad2500blue5a.jpg (23KB, 480x360px) Image search: [Google]

23KB, 480x360px

>>40198236

Keep your palms open if you use a seated bicep machine -- such as Hammer Strength, or Body Masters, or FLEX.

Remember to contract the weight into your ears with your bi's --- not push back with your hands.

>it's all in the mind, most of the time.

>>40198960
>>40199315
nah i've done that too, it's pretty good

Incline DB curl, slow negative