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: The Most Important Key to Workout Consistency
Researchers have figured out how to stay consistent in the gym. Have you? Check this out.
Tip: The Optimal Amount of Time Off
Now we know exactly how much time we can take off between training and a strength competition. Check out the new science.
Tip: The Beast Challenge
Warning: This workout challenge is for advanced lifters only.
Tip: Do These 3 Mobility Drills for Better Squats
Perform these drills before you squat and you'll feel the difference.