How to Get Bigger Arms: A Simple Plan That Starts With Triceps

Here's how to get bigger arms in one sentence: train biceps and triceps directly two or three times a week, do about 8 to 16 hard sets for each per week, add weight or reps over time, and eat enough to gain a little body weight. The triceps make up the larger share of the upper arm, so a plan that only chases curls leaves most of the size on the table.

Below is how to split the work, which exercises earn their place, and two sample arm sessions you can drop into almost any program.

Why your arms aren't growing

Most stalled arms have one of three problems. The sets are too easy (stopping five or more reps short of failure), the weights haven't changed in months, or the person isn't eating enough to grow anything. Arms are small muscles, but they respond to the same basics as everything else.

There's a sneaky fourth one too: swinging. If your curl turns into a hip thrust with a dumbbell, the biceps do maybe half the work. A lighter weight with a full range and a slow lowering phase will build more than heavy cheating ever does. Keep the upper arm still and let the elbow be the only joint that moves.

Train the triceps first

The triceps have three heads: long, lateral and medial. The long head crosses the shoulder joint, so it gets its strongest stretch when your arm is overhead. That's why overhead extensions belong in every arm plan, not just pushdowns. Pushdowns hit the lateral head well, which gives the arm its horseshoe look from the side.

These four cover the triceps from every angle:

• Close-grip bench press: 3 sets of 6-10. Hands about shoulder width, elbows tucked. You can load it heavy, often 70-85% of your normal bench weight.
• Overhead cable or dumbbell extension: 3 sets of 10-15. Let the weight sink until you feel a deep stretch behind the arm.
• Rope or bar pushdown: 2-3 sets of 10-15. Pin the elbows to your sides and lock out fully.
• Dips: 2-3 sets of 6-12, if your shoulders tolerate them. Stay fairly upright to keep the load on the triceps.

Biceps: curls, angles and the brachialis

The biceps bend the elbow and turn the palm up. Underneath them sits the brachialis, which pushes the biceps up from below. Building it makes the whole arm look thicker from the side, and hammer curls and reverse curls train it well. Those two also hit the brachioradialis, which is a big part of how to get bigger forearms.

Pick two or three curl variations that are hardest at different points. An incline dumbbell curl stretches the biceps because the arm hangs behind the body. A preacher curl is toughest near the bottom. A standing EZ-bar curl lets you move the most weight. Rows and pull-ups add useful work too, which is one reason a solid routine of back exercises for width tends to add some arm size on its own.

How many sets and reps for arm growth

For most people, 8 to 16 direct sets per week for biceps and the same for triceps is plenty, on top of pressing and pulling. Beginners can start at 6 to 8 and still grow. Spread the sets over two or three days instead of one giant arm day, because quality drops fast after the fifth or sixth set for the same muscle.

Reps can run anywhere from about 6 to 20 as long as you end each set 1 or 2 reps short of failure. Heavier sets of 6-10 suit close-grip bench and barbell curls. Higher reps of 12-20 suit pushdowns, cable curls and anything that bothers your elbows when it's heavy.

Then make it harder over time. When you hit the top of your rep range on every set, add 2.5-5 lb (1-2 kg) or move up one dumbbell. Small jumps add up: going from 25 lb (11 kg) curls for 8 reps to 35 lb (16 kg) for 8 over a year is real growth. The progressive overload guide shows how to track this without a spreadsheet obsession.

Two sample arm sessions

Add one of these at the end of an upper-body day, or run both on separate days. Rest 60-90 seconds between sets and log every weight.

• Session A (heavier): close-grip bench 3x6-8, EZ-bar curl 3x8-10, overhead dumbbell extension 3x10-12, hammer curl 2x10-12.
• Session B (stretch and pump): dips 3x8-12, incline dumbbell curl 3x10-12, rope pushdown 3x12-15, cable curl 2x15, reverse curl 2x12-15.
• Short on time: pair one biceps and one triceps exercise back to back as a superset. It cuts the session roughly in half with the same total work.

Eat, sleep and measure

Adding an inch to your arms usually comes with several pounds of total body weight. Outside of beginner gains or a comeback after a break, arms rarely grow in a calorie deficit. Aim for a small surplus that adds about 0.25-0.5% of your body weight per week, get enough protein, and sleep seven hours or more.

Body fat changes how arms look, too. Lean arms with visible separation often look bigger than softer arms with the same tape measure number. If your midsection bothers you more than your arms, how to get a six pack explains why that's mostly a body fat question. And since pressing works the triceps hard, a good chest workout for mass helps your arms as well.

Measure every four weeks, flexed, at the same spot and time of day. For a beginner, a quarter to half an inch (about 0.5-1 cm) in a few months is a good result. If you want to see what a fuller upper arm could look like on your own photo first, the arm editor does exactly that.

FAQ