How to Build Bigger Arms: A Simple Plan

Do compound lifts build big arms on their own?

Pulling exercises such as rows and pulldowns work the biceps, and pressing exercises such as the bench press work the triceps. So do you need arm exercises at all? The research is mixed, and most of it is small, short studies:

Study	Who	What they found
Gentil and colleagues, 2015 (Asian Journal of Sports Medicine)	29 untrained men, 10 weeks	Lat pulldowns alone and biceps curls alone grew the elbow flexors by about the same amount (about 6%)
Mannarino and colleagues (Journal of Strength and Conditioning Research)	10 untrained men, 8 weeks, one arm each	The arm trained with curls grew about 11%, the arm trained with rows about 5%
de França and colleagues, 2015 (Applied Physiology, Nutrition, and Metabolism)	20 trained men, 8 weeks	Adding arm exercises to compound lifts made no significant difference to arm size or strength
Barbalho and colleagues (Journal of Strength and Conditioning Research)	20 untrained women, 8 weeks	Adding arm exercises gave a slightly bigger rise in flexed arm size (4.4% against 3.5%), with no difference in strength

The honest summary: compound lifts do build your arms, and for many people they do most of the work. Direct arm exercises may add a little on top, take little time, and are the simplest way to give lagging arms more work.

How many sets for bigger arms

On this site we suggest about 10 to 20 hard sets per muscle per week for most people, spread over at least two sessions. How many sets per week to build muscle explains where that range comes from.

A simple way to count sets for your arms:

• A set of curls or triceps extensions counts as one set for that muscle.
• A set of rows, pull-ups or pulldowns counts as half a set for your biceps.
• A set of bench press, overhead press or dips counts as half a set for your triceps.

Example: if your week has 12 sets of rows and pulldowns, that is about 6 sets for your biceps. Add 6 sets of curls and you are at about 12.

Start near the bottom of the range. Add sets only if you are recovering well and your arm lifts have stopped going up. More is not always better, and every extra set is more work for your elbows as well as your muscles.

The best exercises for bigger arms

Triceps: include an overhead exercise. In a study published online in 2022 in the European Journal of Sport Science, Maeo and colleagues had 21 untrained adults train one arm with overhead cable triceps extensions and the other with cable pushdowns, twice a week for 12 weeks. The triceps of the overhead arm grew about 1.4 times as much, measured by MRI. The overhead position stretches the long head further, which may explain the difference. Pushdowns still worked, so use both.

Biceps: curls, with a full range of motion. Any curl works the biceps. Lower the weight under control and let your arm straighten fully at the bottom, rather than cutting the stretch short.

Brachialis: add a neutral grip. Hammer curls, with your palms facing each other, also train the brachialis and the forearm.

Muscle	Good choices
Triceps (long head emphasis)	Overhead cable or dumbbell extension
Triceps (all heads)	Cable pushdown, close-grip bench press, dips
Biceps	Dumbbell, cable or barbell curl; incline dumbbell curl
Brachialis and forearm	Hammer curl

Pick exercises that feel good on your elbows and that you can load steadily over time. The best exercise is one you can keep progressing on for months.

How hard and how heavy

• Effort: finish most working sets about 1 to 3 reps short of failure. Sets that end far from failure build less muscle.
• Reps: many rep ranges build muscle when sets are hard, but about 6 to 15 reps is practical for arm exercises: heavy enough to be efficient, light enough to keep your form and your elbows happy.
• Progress: use double progression. Pick a range such as 8 to 12 reps. When you hit 12 on every set, add a little weight and work back up. Progressive overload explains the method.
• Form: keep your body still. Swinging a curl moves the work from your arms to your back and hips.

Arm exercises use light weights, so jumps are relatively big. If the next dumbbell is too heavy, add reps first or use smaller plates on a cable.

A simple arm plan

Add these to two of your existing sessions each week, for example your upper-body or pull and push days:

Session A	Sets × reps
Overhead cable or dumbbell triceps extension	3 × 8–12
Dumbbell curl	3 × 8–12

Session B	Sets × reps
Triceps pushdown	3 × 10–15
Hammer curl	3 × 10–15

That is 6 direct sets per muscle each week. Add half a set for every set of pulling (biceps) and pressing (triceps) you already do, and most programs land in the 10 to 20 range. Run it for 8 to 12 weeks, logging every set, before you judge it.

Eat enough to grow

Arms are small muscles, and it is hard to grow any muscle much while dieting hard. If bigger arms are your priority and you are reasonably lean, a lean bulk makes it easier: about 5 to 10% above maintenance calories, aiming to gain about 1 to 1.5% of your body weight a month as a beginner, 0.5 to 1% as an intermediate, and up to 0.5% as an advanced lifter. Lean bulk: how fast to gain weight explains those numbers.

Keep protein at 1.6 to 2.2 g per kg of body weight a day (about 0.7 to 1 g per pound) whichever way you are eating, towards the top of that range if you are cutting.

How to measure your progress

• Your log first. Reps and weights going up on your arm exercises is the earliest sign.
• A tape measure, once a month, at the same spot on the same arm, at the same time of day, relaxed or flexed but the same way each time.
• Photos in the same light and pose every few weeks.

Expect it to take months, not weeks, to see a clear change.

Common mistakes

• Training only biceps. The triceps covers the whole back of your upper arm; give it at least as much work.
• Swinging heavy weights instead of lifting a weight you can control.
• Jumping straight to lots of sets. Sudden big increases in volume often bring sore elbows. If elbow pain does not settle with less work, speak to your doctor or a physiotherapist.
• Expecting growth on a hard diet. You can keep your arms on a cut; adding much size is a job for maintenance or a surplus.
• Changing exercises every week, so nothing is ever progressed.

Where coaching helps

Most people with small arms do not need a secret exercise; they need enough hard sets, steady progress and enough food, week after week. With one-to-one coaching from CoachAk, your training program and nutrition targets sit in a private app, and you log every workout in a training log that tracks your personal bests and carries your coach's comments. You can send form-check videos of your curls and extensions for your coach to reply to, track your body measurements, and send a weekly check-in that takes about three minutes. Your coach replies with written feedback and adjusts your program and targets as you progress.

If you want a plan that gets your arms growing, apply for coaching.