Most training programs treat the forearms as an afterthought – something that gets worked incidentally through pulling and gripping. For some people with good forearm genetics, that’s enough. For everyone else, it isn’t. Weak forearms cap grip strength, which caps deadlifts, rows, pull-ups and every other pulling exercise in a program. The forearm is also the most visible part of the arm in everyday life, and underdeveloped forearms undercut an otherwise solid physique in a way that’s hard to disguise.
The good news is that effective forearm training requires no equipment at all. Bodyweight exercises – particularly hanging and pulling variations – provide a strong enough stimulus to build both size and grip strength, especially for anyone not yet doing direct forearm work.
Why Train Your Forearms?
Grip strength doesn’t come from the hands alone. Gripping actively engages the forearm musculature – the wrist flexors, extensors and brachioradialis all contribute. A weak forearm limits grip regardless of how strong the hands feel, which is why direct forearm training produces grip improvements that compound exercises alone can’t replicate.
Beyond grip, well-developed forearms contribute directly to performance on advanced calisthenics movements – the planche, front lever and one-arm chin-up all demand forearm and wrist strength that most lifters haven’t specifically trained. And aesthetically, forearms are visible in a way that most muscle groups aren’t: they show in a t-shirt, in everyday life, in photos. They’re worth training deliberately.
Anatomy of the Forearm
Your forearm has twenty muscles in it, and they are commonly separated into three distinct groups. These groups include:
- The brachioradialis, which is the large muscle that flexes the forearm. It is the biggest and most visible muscle in there, and is in fact rather easy to build via exercise.
- Theflexors, which work to supinate the forearm. Whenever you rotate your hands (for instance while alternating your grip for pull-ups or chin-ups), you are in fact putting your flexors to work. Additionally, your flexors are also responsible for extension, an example of which would be you showing your palm to someone with your arm extended, commonly interpreted as a manual “stop” sign.
- The extensors, which work to perform the opposite moves to the flexors. In the previous “stop sign” example, if you had instead allowed your hand to drop down, fingers pointing to the floor while still keeping your arm extended, you’d have used your extensors to pull that motion off.
All three groups are engaged in virtually every pulling and gripping movement. Bodyweight exercises load them through sustained tension and grip demand rather than through weighted wrist curls – a different stimulus that produces genuine functional strength alongside size.
How to Train Forearms With Bodyweight
Forearm muscles are predominantly slow-twitch fibers, which means they respond well to high volume training – more sets and reps, sustained time under tension. Bodyweight training suits this well. The exercises below can be done with a pull-up bar, a pair of parallel bars and a set of towels. Most require nothing at all.
Mix and match based on what’s available. The ones that demand the most grip – towel pull-ups, bar hangs, climbing – produce the most forearm development. The others contribute while hitting other muscle groups simultaneously.
The Best Bodyweight Forearm Exercises
The Inverted Row
A solid entry-level pulling exercise and a good stepping stone toward pull-ups. Lie under a bar set at roughly hip height, grip it with both hands shoulder-width apart and hang with arms fully extended. Pull your chest up to the bar, keeping the body rigid, then lower with control. The lower the bar, the harder the movement. Go for 2–4 sets of 6–10 reps. Once this becomes easy, move on to pull-ups.
The Pull-up
One of the best overall upper body exercises available, and a strong forearm builder as a secondary benefit. Hang from a bar with a pronated grip (palms facing away), hands slightly wider than shoulder-width. Pull until the chin clears the bar, then lower with control – don’t drop. The wider the grip, the harder the pull. Keeping the torso in a hollow body position increases the demand significantly. Go for 2–3 sets of 10 reps. Push one or two sets to failure occasionally.
The Chin-up
Everything that applies to the pull-up applies here. The supinated grip (palms facing you) recruits the biceps more directly, making chin-ups marginally better for arm development. The forearm demand is similar. Alternate between the two or stick with one – either approach works. 2–3 sets of 10 reps, with occasional failure sets.
The Towel Pull-up
The most demanding forearm exercise on this list. Drape two sturdy towels over a pull-up bar and grip one in each hand. The thick, unstable surface forces the forearm and grip to work far harder than a fixed bar. Pull up the same way you would a standard pull-up. Be careful – losing grip on one towel mid-rep can cause a fall. Start with hangs if the full pull-up is too much. Work toward 2 sets of 10 reps; in the meantime, do as many reps as possible per set.
Forearm Plank
Primarily a core exercise, but resting on the forearms rather than the hands places direct load on the forearm extensors and builds isometric endurance. Keep the body in a straight line from head to heel, hips level, core tight. Don’t let the lower back sag or the hips pike. Aim for 2–3 sets of 60 seconds, with at least 60 seconds rest between sets.
Forearm Side Plank
More demanding than the standard side plank and a better forearm stimulus. Balance on the lower forearm with the body in a straight lateral line – ear, shoulder, hip, ankle all aligned. The upper arm can rest on the hip or extend upward. Avoid letting the hips drop. 2–3 sets of 30 seconds per side, with at least 30 seconds rest between sets.
Sit on the floor with hands behind you, fingers pointing forward, and lift the hips. Walk forward ten steps, then backward ten steps. The weight-bearing on extended wrists loads the forearm extensors and improves wrist stability. Repeat until 60 seconds pass, rest for an equal amount, then repeat. Two to three sets.
Primarily a chest and triceps exercise, but the grip and forearm demand during the stabilization phase makes it a useful secondary forearm builder. Keep the torso upright for more triceps emphasis; lean forward for more chest. For a harder variation, extend the legs parallel to the ground throughout the movement. 2–3 sets of 10 reps, adding sets as it becomes easier.
Can be performed with bands or improvised loading. The neutral (hammer) grip targets the brachioradialis – the large outer forearm muscle – more directly than a standard curl. Keep elbows pinned to the sides, curl through a full range of motion, lower slowly. 2–3 sets of 8–10 reps.
Climbing
Not a gym exercise but worth including: climbing – whether bouldering, rope climbing or wall climbing – places higher demands on the forearms and grip than almost any other activity. The irregular grip positions and sustained loading produce forearm development that transfers directly to gym performance. It requires access to a wall or course, but the carryover makes it worth pursuing if the option exists.
- Best Forearm Exercises for Size, Strength and a Crushing Grip
- Charles Bronson’s Brutal Bodyweight Workout Routine: How Hollywood’s Toughest Actor Built His Physique
