How to Get Bigger Forearms: Exercises, Sets and Real Expectations

If you want to know how to get bigger forearms, the short answer is to train them directly two or three times a week instead of hoping rows and curls will do it. Hit the wrist flexors with wrist curls, the extensors with reverse wrist curls, and the brachioradialis (the thick muscle on top near the elbow) with hammer and reverse curls. Add heavy carries for grip, use 10-25 reps, and push the sets hard.

Forearms have a reputation for being stubborn, and part of that is genetics. But most people who say theirs won't grow have never done more than a few lazy wrist curls at the end of a long session. Here's what actually works and how much change to expect.

What makes up the forearm

Your forearm has around 20 muscles, but for size you only need to think about three groups. The flexors run along the palm side and curl your wrist and fingers. The extensors sit on the back and pull your wrist and fingers the other way. The brachioradialis runs from the upper arm down to the thumb side of the wrist and helps bend the elbow, especially with a neutral or palms-down grip.

The flexors are the biggest group, so they add the most to the tape measure. The brachioradialis is what makes a forearm look thick from the front when you're wearing a T-shirt. The extensors matter less for size but keep the wrist balanced and your elbows happier when you train the flexors hard.

Why your forearms aren't growing

Forearms do get work from pulling, but it's mostly isometric. Your grip holds the bar still while your back does the moving, and the forearm muscles rarely get taken close to failure through a full range. That's enough to keep them from shrinking, not usually enough to make them grow much.

Genetics play a bigger role here than with most muscles. Some people have long forearm muscle bellies that fill the whole arm, others have short ones with a lot of tendon near the wrist. You can't change where a muscle attaches. You can make the muscle you have bigger, and that still makes a visible difference, especially at the thick part just below the elbow.

The last reason is effort. Wrist curls burn a lot, and people tend to stop when the burn starts rather than when the muscle is actually close to failure. Push through to within 1-2 reps of failure, like you would on any other exercise.

The best exercises for bigger forearms

Pick one exercise from each of the first three lines, then add carries or hangs for grip. That covers the whole forearm in four movements.

• Wrist curl (flexors): 3 sets of 12-20. Sit with your forearms on your thighs or a bench, palms up, and let the bar roll down to your fingertips before curling it back up. That bottom stretch is where most of the work happens.
• Reverse wrist curl (extensors): 2-3 sets of 15-25. Same setup, palms down. Use about half the weight of your wrist curls or less.
• Hammer curl or reverse curl (brachioradialis): 3 sets of 8-15. Keep the elbows still. An EZ-bar reverse curl is easier on the wrists than a straight bar.
• Farmer's carry: 3 walks of 30-40 meters (about 100-130 feet) with dumbbells as heavy as you can hold without the handles slipping.
• Dead hang: 2-3 holds from a pull-up bar for as long as you can, aiming for 30-60 seconds. Great for grip and easy to do at the end of a pull day.

Sets, reps and how often to train forearms

Forearms recover fast because you use them all day. Most people do well with 6-12 hard direct sets per week, split across two or three sessions. A common setup is two short forearm blocks of 3-4 sets, each taking about 10 minutes at the end of an upper or pull day.

Higher reps suit the wrist exercises. Sets of 12-25 keep the load light enough that your wrists and elbows don't complain, while still building muscle, which lines up with what the best rep range for hypertrophy guide explains. Hammer and reverse curls work fine at 8-15.

Progress the same way you would anything else. On wrist curls, get 3x20 with clean reps, then add 5 lb (2.5 kg) and work back up. A barbell wrist curl that starts at 45-55 lb (20-25 kg) can reach 80-100 lb (35-45 kg) for sets of 15 within a year for many lifters. Write it down so you actually see it moving.

A simple 8 week forearm plan

Tack these onto the end of two different upper body days. Rest 45-75 seconds between sets. If you also run a separate arm session, the hammer curls can replace one of your regular curl exercises rather than adding to them.

• Day 1: barbell wrist curl 3x15-20, reverse EZ-bar curl 3x10-12, farmer's carry 3x30 meters.
• Day 2: dumbbell wrist curl 3x12-15, reverse wrist curl 3x15-20, hammer curl 2x10-12, dead hang 2 sets to failure.
• Weeks 1-2: stop sets 3 reps short of failure while your tendons adjust. Weeks 3-8: take most sets within 1-2 reps of failure and add weight once you hit the top of the range.

Grip, straps and your other lifts

There's a fair question here: if grip is a forearm exercise, should you skip straps on deadlifts and rows? Not really. Straps let your back and traps get the heavy work they need, and the forearms get their own training later. Use straps on your heaviest back sets and go without them on warm-ups and lighter work. That way you get grip practice without your hands limiting your back training. The back exercises for width post covers the pulling side of that.

Heavy shrugs and carries are useful crossover work too. Holding a 100 lb (45 kg) dumbbell in each hand for a 40 meter walk hits your forearms, traps and core at once, which is why it shows up in the how to build traps routine as well.

How much growth to expect

Forearms grow slowly. A realistic result for someone training them directly for the first time is about a quarter to half an inch (0.5-1 cm) of forearm circumference in three to six months, and less after that. Measure at the thickest point, a few inches below the elbow, with the arm relaxed and hanging, at the same time of day each month.

How big they look also depends on your upper arm and body fat. Lean forearms with visible veins and muscle separation look bigger than softer ones at the same measurement. Since the brachioradialis also helps bend the elbow, forearm work tends to make the whole arm look thicker, which fits nicely with the plan in how to get bigger arms. If you want to see what fuller arms could look like on your own photo, try the arm editor.

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