How to get bigger arms with evidence-based training: weekly sets for biceps and triceps, the best exercises, why overhead triceps work matters, and a sample plan.
To get bigger arms, train biceps and triceps directly 2 to 3 times a week for about 10 hard sets each per week, in the 8 to 15 rep range, stopping 1 to 3 reps short of failure. Include an overhead triceps extension: a 2023 study found it grew the triceps about 1.4 times more than a neutral-arm version. Add reps, then weight, every week, and eat enough to gain.
Arms are the muscle group almost everyone wants to grow, and the one most people train in the least organised way: a few random sets of curls at the end of a session, whenever there is time.
Bigger arms come from the same things as any muscle: enough hard sets, often enough, with progressive overload. Here is how to apply that to biceps and triceps.
Hard sets, progressed over time, with enough food to support growth. Your triceps make up most of your upper-arm mass, so a plan that only focuses on curls leaves the biggest muscle undertrained.
The three levers are:
For beginners, compound lifts do a lot, but most people still benefit from direct arm work. A 2013 study by Gentil and colleagues had 29 untrained young men train for 10 weeks with either bench press and lat pulldown only, or the same exercises plus curls and triceps extensions. Both groups grew their elbow flexors by a similar amount, about 6.5% and 7%.
That result applies to untrained beginners over 10 weeks. Once you have been training for a while, compound lifts tend to grow your chest and back more than your arms, and direct work becomes the easiest way to add arm volume without more fatigue. Count compound pressing and pulling as partial arm work and fill the rest with isolation.
Aim for about 10 hard sets per week each for biceps and triceps, counting direct work. Start lower, around 6 to 8, if you also do a lot of rows and presses, and build up if you recover well.
| Experience | Direct biceps sets/week | Direct triceps sets/week |
|---|---|---|
| Beginner | 4 to 6 | 4 to 6 |
| Intermediate | 8 to 12 | 8 to 12 |
| Advanced | 12 to 16+ | 12 to 16+ |
Spread them across 2 or 3 sessions. Five sets of curls on Monday and five on Thursday will beat ten sets in one go. For more on dosing, see our guide to weekly sets per muscle.
The best arm exercises train the muscle through a long range of motion and are easy to progress. Pick one or two for each muscle.
Biceps: dumbbell curls, incline dumbbell curls, cable curls, hammer curls (also train the brachialis and forearms), and chin-ups.
Triceps: overhead cable or dumbbell extensions, skull crushers, pushdowns, close-grip bench press, and dips.
The long head of the triceps crosses the shoulder, so it is stretched more when your arm is overhead. A 2023 study by Maeo and colleagues had 21 adults train one arm with overhead cable extensions and the other with neutral-arm extensions for 12 weeks. The overhead arm grew about 1.4 times more in whole triceps volume (+19.9% vs. +13.9%) and about 1.5 times more in the long head (+28.5% vs. +19.6%), even though it used lighter weights.
Keep pushdowns if you like them, but include an overhead variation too.
Add arm work to the end of an existing program. Here is an example for a 4-day upper/lower split, with arms on both upper days:
| Day | Arm work | Sets × reps |
|---|---|---|
| Upper 1 | Incline dumbbell curl, overhead cable triceps extension | 3 × 8 to 12 each |
| Upper 1 | Hammer curl, triceps pushdown | 2 × 10 to 15 each |
| Upper 2 | Cable curl, skull crusher | 3 × 10 to 12 each |
| Upper 2 | Chin-ups or close-grip bench press, counted toward arm volume | As programmed |
That is about 8 direct sets per muscle per week, plus compound work. Rest about 90 seconds between arm sets.
Use double progression with a wide rep range, like 8 to 15. Small muscles need room to absorb weight jumps: going from 25 lb to 30 lb dumbbells on curls is a 20% increase. Add reps until you hit 15 on every set with a rep or two in reserve, then go up 5 lb per hand and drop back to about 8 to 10 reps. Our post on dumbbell jumps that are too big explains how to handle the gap.
Arms usually stop growing because of too few hard sets, too little effort per set, or too little food.
Alexandros is a personal lifting coach you talk to in a chat, currently in early access. You log "curls 3 × 12 with the 30s, last set hard" and it records each set with an effort rating, then tells you what to do next time using double progression with realistic 5 lb per-hand dumbbell jumps and about 10 lb on cables and machines. Ask "How has my curl progressed?" for a chart of top weight, estimated 1RM, or volume.
Most people notice a difference within 2 to 3 months of consistent, progressive training. Large changes take a year or more and depend on eating enough.
No. Two or three sessions a week with rest days between gives you enough frequency and time to recover.
Chin-ups train the biceps hard, but most lifters still benefit from adding curls. Count chin-ups as partial biceps volume.
You need enough food to build new muscle, so a small surplus helps most. Beginners and people with higher body fat can still grow arms at maintenance.
About 8 to 15 reps works well for most arm exercises. Sets should end 1 to 3 reps short of failure.
