Many beginners train their biceps with one basic curl variation, then wonder why their arms do not look noticeably wider. The issue is not usually effort. It is that the visible width of the upper arm comes from more than the biceps brachii alone.
The biceps brachii has two heads, called the long head and short head. Underneath it sits the brachialis, a powerful elbow flexor that can push the biceps upward and outward as it grows. The brachioradialis, which runs through the upper forearm, also adds thickness around the elbow and makes the arm look more substantial from the front and side.
For beginners, the fastest route to wider looking arms is not chasing endless exercise variety. It is choosing a small number of movements that train elbow flexion through different hand positions and muscle lengths, then performing them consistently with good technique. Research consistently shows that resistance training increases muscle size, while sufficient weekly volume, progressive overload, a full controlled range of motion, and effort close to muscular failure all help support hypertrophy.
The three exercises below give you a simple and effective starting point. Together, they train the biceps, brachialis, and brachioradialis without making your program unnecessarily complicated.
What Makes Biceps Look Wider?
The biceps are easy to see when you flex your arm, but width is not exactly the same thing as peak. A high biceps peak is influenced partly by anatomy, including tendon insertion points that cannot be changed through training. However, nearly everyone can make their upper arms look fuller, thicker, and wider by building more muscle across the elbow flexors.
The brachialis is particularly important for this goal. It sits beneath the biceps and contributes strongly to elbow flexion. When it becomes larger, it can create a thicker upper arm appearance, especially when viewed from the front. The brachioradialis also contributes to arm size near the elbow, helping the lower half of the upper arm and upper forearm look more muscular.
Blow Up Your Pecs Using These 3 Exercises in the Gym
This is why standard supinated curls, where the palms face upward, should not be your only biceps exercise. They are excellent for the biceps brachii, but a complete beginner program should also include neutral grip and pronated grip movements. Changing the grip changes the contribution of the elbow flexor muscles and gives the arm a more complete training stimulus.
You do not need to train your arms every day to see results. Research on resistance training volume suggests that muscles generally respond well to multiple challenging sets each week, with more weekly sets often producing greater hypertrophy up to a point. For a beginner, starting with six to ten hard sets for the biceps and related elbow flexors per week is usually enough to make progress while learning proper form and recovering well.
Exercise One: Dumbbell Hammer Curl
The dumbbell hammer curl is one of the best exercises for building a wider looking arm because it trains the brachialis and brachioradialis hard while still involving the biceps. Instead of turning your palms upward, you keep your palms facing one another throughout the movement.
This neutral grip position makes the hammer curl a useful complement to conventional curls. It gives beginners a straightforward way to train the muscles that add thickness around the sides of the upper arm and upper forearm. It is also relatively easy to learn, especially compared with curl variations that demand more shoulder stability or strict positioning.
How to Perform the Dumbbell Hammer Curl
Stand tall with a dumbbell in each hand and your arms by your sides. Set your shoulders gently back and down, then keep your chest lifted without leaning backward. Your palms should face inward toward your thighs.
Curl the dumbbells upward by bending your elbows. Keep your upper arms close to your body rather than allowing your elbows to drift forward. Stop when the dumbbells reach close to the front of your shoulders, then lower them slowly until your elbows are straight.
The lowering phase matters. Muscle growth is supported by training that places the muscle under meaningful tension through a controlled range of motion. Do not drop the weights down. Take around two to three seconds to lower each repetition, while keeping your wrists straight and your body still.
Why Hammer Curls Work for Width
Hammer curls allow the brachialis to contribute strongly because it works regardless of whether the forearm is turned upward, inward, or downward. The brachioradialis is also well placed to contribute during neutral grip elbow flexion. Both muscles can make the arm look more substantial, especially when viewed with relaxed arms at your sides.
Beginners often make hammer curls less effective by using weights that are too heavy. If your torso rocks backward, your shoulders rise, or your elbows shoot forward, your biceps are losing tension and momentum is doing too much of the work. A lighter weight with clean repetitions will provide a better stimulus.
Start with two or three sets of eight to twelve repetitions. Choose a weight that makes the final two or three repetitions difficult while still allowing you to maintain the same form from the first repetition to the last.
Exercise Two: Incline Dumbbell Curl
The incline dumbbell curl is a highly effective movement for beginners who want to develop the biceps brachii, particularly when they need a curl that feels strict and difficult without extremely heavy weights. Sitting on an incline bench places the arms slightly behind the torso at the start of each repetition.
This position means the biceps begin the curl at a longer muscle length. Training muscles at longer lengths has received increasing attention because research suggests it can be a productive way to stimulate hypertrophy. You do not need to force an uncomfortable stretch, but controlling the bottom position of an incline curl gives the biceps a challenging start to every repetition.
How to Perform the Incline Dumbbell Curl
Set an adjustable bench to a moderate incline. Sit back with your head, shoulders, and upper back supported by the bench. Hold a dumbbell in each hand with your arms hanging down beside your body.
Begin with your palms facing forward or slightly inward if that feels more comfortable on your elbows. Curl the dumbbells upward without allowing your elbows to move far forward. Keep your upper arms behind or close to the line of your torso as you lift.
Squeeze your biceps at the top, then lower the dumbbells slowly until your elbows are fully straightened or nearly straightened. The bottom position should feel like a stretch through the front of your upper arm, but never sharp pain in the shoulder or elbow.
Why Incline Curls Build More Complete Biceps
The incline curl makes it harder to cheat because the bench supports your torso and limits your ability to swing the weight. This lets a beginner focus on the biceps rather than turning every repetition into a whole body movement.
It also exposes the biceps to tension in a stretched position. Full range resistance training is generally supported by research for hypertrophy because it allows the target muscles to work through a larger movement. For biceps training, this means you should not stop each repetition halfway down simply because the lower portion feels hard.
Use a lighter weight than you would for standing curls. The incline position is demanding, and a weight that feels easy when standing can become difficult very quickly on a bench. Perform two or three sets of eight to twelve repetitions, keeping one or two repetitions in reserve for most sets. As your technique improves, you can occasionally take the final set closer to failure.
Exercise Three: Reverse Curl
The reverse curl uses an overhand grip, with the palms facing downward. It is one of the most useful movements for beginners who want their arms to look wider and thicker because it gives extra attention to the brachioradialis and brachialis.
This exercise will usually feel weaker than a normal curl because the biceps brachii has less mechanical advantage when the forearm is pronated. That does not make it an inferior exercise. It simply shifts more work toward other muscles that matter for overall arm size.
You can perform reverse curls with a straight bar, an EZ bar, dumbbells, or a cable attachment. Dumbbells are often the most comfortable choice for beginners because each wrist can move naturally. An EZ bar can also be useful if a straight bar feels awkward on your wrists.
How to Perform the Reverse Curl
Stand upright and hold your chosen weight with an overhand grip. Start with your arms straight, your shoulders down, and your elbows close to your sides. Curl the weight upward while keeping the backs of your hands facing forward.
Lift until your forearms are close to vertical. You do not need to force the weight all the way to your shoulders if doing so causes your wrists to bend or your elbows to move excessively forward. Lower under control until your arms are straight again.
Keep your wrists neutral throughout the exercise. A common mistake is allowing the wrists to bend backward as the weight rises. This can make the movement less comfortable and shift unnecessary stress onto the wrist joint. Think about keeping the knuckles aligned with the forearms.
Why Reverse Curls Matter for Wider Arms
A well developed brachioradialis adds muscular detail and thickness between the upper arm and forearm. This is especially visible when your arms are relaxed, carrying bags, holding a barbell, or wearing a short sleeved shirt. Reverse curls also train the brachialis, which can contribute to a broader looking upper arm by adding mass beneath the biceps.
Because the grip is challenging, do not treat reverse curls as an exercise for maximal loading. Use a manageable weight, move smoothly, and focus on feeling the muscles around the upper forearm and lower biceps work. Two sets of ten to fifteen repetitions are enough for most beginners at first.
How to Combine These Exercises
The best routine is the one you can repeat consistently. You can perform all three exercises in one session twice per week, leaving at least one full day between sessions. Alternatively, split them across two upper body workouts.
A simple approach is to begin with incline dumbbell curls, since they demand the most control and are easiest to perform with fresh arms. Follow with hammer curls, then finish with reverse curls. This order lets you train the biceps brachii directly before placing more emphasis on the brachialis and brachioradialis.
Start conservatively. Your biceps already work during pulling exercises such as pulldowns, rows, and chin ups. If you are doing a full body or upper body program, adding too much direct arm work immediately can leave your elbows sore and make your pulling sessions worse.
As you become stronger, aim to progress gradually. You can add one or two repetitions with the same weight, improve your technique, add a small amount of load, or add a set only when recovery remains good. Progressive overload does not require dramatic weight jumps. Small improvements repeated over months are what build noticeable muscle.
Form, Recovery, and Nutrition Matter
Exercise selection is important, but it is only one part of building wider biceps. Your sets need to be challenging enough to create a reason for the muscle to adapt. Research indicates that hypertrophy can occur across a broad range of loads when sets are performed with sufficient effort. This means you do not need very heavy weights to grow your arms. Moderate and lighter weights can work well when you take the set close enough to muscular failure with controlled technique.
Recovery also matters. Muscles grow between training sessions, not during the curl itself. Sleep, total food intake, and protein intake all influence your ability to recover and build lean mass. Evidence supports higher daily protein intakes for people doing resistance training, with benefits commonly seen around 1.6 grams of protein per kilogram of body weight per day, although individual needs vary.
Finally, be patient. Early strength improvements can happen quickly as your coordination improves, but visible muscle growth takes repeated training over weeks and months. Take photos in consistent lighting, keep a training log, and judge progress over longer periods rather than from one workout to the next.
Key Takeaways
| Focus | What to do | Why it matters |
|---|---|---|
| Build arm width | Train the biceps, brachialis, and brachioradialis | Wider looking arms require more than standard palm up curls |
| First exercise | Perform incline dumbbell curls | This trains the biceps through a controlled and challenging range |
| Second exercise | Perform dumbbell hammer curls | The neutral grip emphasizes muscles that add upper arm thickness |
| Third exercise | Perform reverse curls | The overhand grip develops the brachioradialis and brachialis |
| Weekly training | Start with six to ten challenging direct sets each week | This gives beginners enough stimulus without excessive fatigue |
| Progression | Add repetitions, load, or better control over time | Progressive overload is essential for continued muscle growth |
| Recovery | Eat enough protein and allow time between sessions | Training adaptations depend on recovery as well as effort |
References
- American College of Sports Medicine (2009) ‘American College of Sports Medicine position stand: Progression models in resistance training for healthy adults’, Medicine and Science in Sports and Exercise, 41(3), pp. 687 to 708.
- Baz Valle, E., Balsalobre Fernandez, C., Alix Fazey, M. and Santos Concejero, J. (2022) ‘The effects of exercise selection on muscle hypertrophy: A systematic review and meta analysis’, Journal of Sports Sciences, 40(13), pp. 1542 to 1552.
- Grgic, J., Schoenfeld, B.J., Orazem, J. and Sabol, F. (2022) ‘Effects of resistance training performed to repetition failure or non failure on muscular strength and hypertrophy: A systematic review and meta analysis’, Journal of Sport and Health Science, 11(2), pp. 202 to 211.
- Grgic, J., Schoenfeld, B.J., Skrepnik, M. and Davies, T.B. (2021) ‘Microloading in resistance training: A narrative review’, Sports, 9(7), 94.
- Lixandrão, M.E., Ugrinowitsch, C., Berton, R., Vechin, F.C., Conceição, M.S., Damas, F., Libardi, C.A. and Roschel, H. (2018) ‘Magnitude of muscle strength and mass adaptations between high load resistance training versus low load resistance training to failure: A systematic review and meta analysis’, Sports Medicine, 48(2), pp. 361 to 378.
- Maeo, S., Murase, T., Otsuka, S., Kanehisa, H. and Kawakami, Y. (2021) ‘Hypertrophy of the hamstrings after knee flexion exercise performed with different muscle tendon unit lengths’, Medicine and Science in Sports and Exercise, 53(11), pp. 2399 to 2408.
- Morton, R.W., Murphy, K.T., McKellar, S.R., Schoch, R.D., Henselmans, M., Helms, E., Aragon, A.A., Devries, M.C., Banfield, L., Krieger, J.W. and Phillips, S.M. (2018) ‘A systematic review, meta analysis and meta regression of the effect of protein supplementation on resistance training induced gains in muscle mass and strength in healthy adults’, British Journal of Sports Medicine, 52(6), pp. 376 to 384.
