5 Exercises Killing Your Biceps

Training comic · May 7, 2026 · 6 slides

To maximize bicep growth, avoid common training mistakes such as performing half-reps, using momentum, and lifting excessively heavy weights. Additionally, skip ineffective variations like behind-the-back cable curls and ensure you target the brachialis muscle with hammer curls.

The GainFrame mascot stands looking confused while flexing a small bicep, introducing the topic of common bicep training mistakes.
Gainframe Guy. 5 Exercises Killing Your Biceps. ?
The GainFrame mascot holds a dumbbell with a limited range of motion, illustrating how half-reps limit muscle growth.
#1 Half-Rep Curls. Half range = half the gains. Go full lockout to stretch. Full top X. Full bottom X.
The GainFrame mascot struggles and swings a heavy barbell using momentum, showing how poor form reduces bicep activation.
#2 Swinging the Weight. Momentum doesn't build muscle. Lower the weight, lock the form.
The GainFrame mascot looks confused while attempting a behind-the-back cable curl, highlighting that standard curls are more effective.
#3 Behind-Back Cable Curls. Looks cool. Doesn't isolate. Use a regular curl instead. ? Overrated.
The GainFrame mascot strains and sweats while holding an excessively heavy dumbbell, demonstrating that lifting too heavy reduces muscle tension.
#4 Going Too Heavy. Ego ≠ tension. Pick a weight you can actually feel. Zero tension.
A side-by-side comparison shows the GainFrame mascot's arm anatomy highlighting the brachialis muscle next to the correct exercise, hammer curls.
#5 Skipping the Brachialis. Hammer curls build the peak. Don't skip them. Biceps. Biceps. Brachialis the peak maker. Correct exercise.

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