Most multi-joint upper-body pulling exercises predominantly train the biceps in the mid to shortened-range position.
To increase your strength, do exercises like preacher curls and what I call "face-away cable curls" shown here.
related posts
Tip: Free Up Your Back Training
Certain attachments allow for more natural movement patterns for better gains and fewer pains.
Tip: Avoid the Ballerina Lift-Off
It's a common squat mistake that most people don't even realize they're making. Here's why it's wrong and how to fix it.
Tip: The Missing Exercise for Pumped Pecs
Bench presses and push-ups are great, but they don't strengthen the entire chest. Here's what to add to chest day.
Tip: Deadlift Without Sciatic Pain
An angry sciatic nerve will wreck deadlift day. Here's the simple solution you're going to wish you'd known about sooner.