To get bigger biceps, train them directly with curls across varied angles and grips, at roughly 10 to 20 hard sets per week in the 8 to 15 rep range, keep the form strict, and add reps or load over time. The biceps already get worked whenever you pull, so the direct curling you add is what pushes them past what rowing and chin-ups alone build.
The biceps are a small muscle, which means two things: they grow slowly, and they’re easy to shortchange with sloppy form. Strict, progressive curling through a full range is the whole game.
The muscles involved
The biceps brachii has two heads — long and short — that together flex the elbow and supinate the forearm. The long (outer) head contributes to the biceps peak and is stretched more when the arm is behind the body, as in incline curls. The short (inner) head sits toward the middle. Underneath lies the brachialis, which doesn’t show directly but pushes the biceps up and widens the arm when developed; it’s trained by neutral-grip and hammer curls. Building bigger biceps means training both heads through varied arm positions and giving the brachialis its own work. The forearms assist and are worth some grip-oriented work too.
Best exercise categories
Use three categories of curl. The first is standard curls — barbell and dumbbell — for loading the biceps heavily and progressing cleanly. The second is stretched-position curls, like incline dumbbell curls, where the arm hangs behind the torso and the long head is loaded in a lengthened position. The third is neutral-grip and hammer curls, which bring in the brachialis and forearms.
Rotating through these angles trains the biceps more completely than repeating one curl. Browse variations in the exercises library, and see how to get bigger arms for how biceps fit alongside triceps work.
Volume and rep ranges
Aim for about 10 to 20 hard sets for the biceps per week, most people doing well around 12 to 16, split across two sessions. Count the biceps work your back training already provides — heavy rows and chin-ups load the biceps hard, so you may need less isolation than expected. The sets per week for muscle guide covers this counting.
Biceps respond best in the 8 to 15 rep range, where you can keep constant tension on a small muscle without needing joint-straining loads. Some higher-rep sets to 20 work well on cables and machines. Keep every set within a few reps of failure — see reps left — and prioritize clean tension over heavy weight. More on ranges in best rep range for muscle.
How to progress
The biceps follow progressive overload like anything else, but with strict form as the fixed constant. A curl that only moves more weight because you’re swinging your torso isn’t progressing the biceps — it’s cheating the muscle out of the work. Add a rep or a small load increment while keeping the movement clean, and log it so the trend is visible across a mesocycle. Take a deload week when progress stalls.
Common mistakes
The biggest mistake is using momentum — swinging the weight up with the hips and back so the biceps barely work. Slow the tempo, keep the elbows pinned, and let the biceps move the load. The second is cutting range short, stopping before the arm fully extends at the bottom, which skips the stretched portion where much of the growth stimulus lives.
The third mistake is training only one curl variation and never hitting the long head or brachialis, leaving the arm underdeveloped from certain angles. The fourth is expecting fast results from a small muscle and then over-training it in frustration; biceps grow slowly and need recovery like anything else. Keep nutrition and protein adequate so the slow gains actually accumulate. The broader picture is in the hypertrophy guide.
Counting the biceps volume your back work already supplies and progressing curls without letting form slip is fiddly to manage by hand. Checkfit does it automatically — an adaptive program, automatic weight selection, RIR-based progression, and nutrition targets set to your goal. Get Checkfit at checkfit.com.
