Deltoids: the best exercises for each head of the shoulder, at the gym and at home
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The shoulder press does not do the job alone: the lateral and rear delts need their own exercises. What the activation studies say and how to build a complete shoulder routine.
Broad shoulders change your whole silhouette: they make the waist look narrower and the back look bigger. That is why almost everyone trains them, and almost everyone does it the same way: overhead press, a few front raises and little else. The result is usually a heavily trained front delt, because it already gets loaded in every chest exercise, and lateral and rear delts that lag behind. Those are precisely the ones that create width.
In this guide you will see how the deltoid works, which exercises activate each of its three parts according to electromyography studies, how many sets you need, a sample routine for the gym and another for home, and how to train your shoulders without ending up in pain.
The three heads of the deltoid and what each one does
The deltoid is a single muscle with three portions that pull in different directions. That is the key to all shoulder training: each portion responds to a different movement, and no single exercise trains them all equally.
| Portion | Main function | What it adds visually | Key exercises |
|---|---|---|---|
| Anterior (front) | Bring the arm forward and up | Front volume of the shoulder | Overhead press, bench press |
| Lateral (middle) | Move the arm out to the side | Shoulder width | Lateral raises, presses |
| Posterior (rear) | Bring the arm backwards | The shoulder seen from the side and back | Reverse flyes, face pulls, wide rows |
If you only remembered one thing, it would be this: the front delt gets trained almost by itself with pressing, while the lateral and rear delts need exercises of their own.
What the activation studies say
Campos and colleagues (2020) used electromyography to measure the activation of the three deltoid portions in 13 trained men performing the bench press, dumbbell flyes, shoulder press and lateral raises at 60% of their max. The results rank the priorities very clearly:
| Exercise | Front delt | Lateral delt | Rear delt |
|---|---|---|---|
| Shoulder press | 33.3% | 27.9% | 11.4% |
| Lateral raise | 21.2% | 30.3% | 24.0% |
| Bench press | 21.4% | 5.0% | 3.5% |
| Dumbbell flyes | 18.8% | 3.4% | 2.5% |
Three practical conclusions. The shoulder press is the best exercise for the front delt and a good one for the lateral delt. The lateral raise activates the lateral delt the most and, surprisingly, the rear delt too. And the bench press barely touches the lateral and rear delts: if your shoulder training depends on chest days, you are missing two thirds of the muscle.
A note on electromyography: it measures how much a muscle activates during a set, not how much it grows in the long run. It is a useful clue for choosing exercises, but it does not replace hypertrophy studies. That is why we use it here to rank priorities, not as a final verdict.
The best exercises for the front and lateral delts
Overhead press and dumbbell press
The barbell overhead press and the seated dumbbell press are the foundation of shoulder day. Saeterbakken and Fimland (2013) compared four versions in 15 men: barbell or dumbbells, standing or seated. The standing dumbbell press, the least stable, activated the deltoid the most, although it also allowed the least weight: 7% less than the standing barbell and 10% less than seated dumbbells. Doing it seated reduced rear delt activation by about a quarter.
The practical reading is that there is no single "best" press. If you want strength and heavy loads, go for the barbell. If you want deltoid work and to fix differences between arms, go for dumbbells. The Arnold press, with a wrist rotation, is a valid variation to change the stimulus.
Lateral raises: the width exercise
Lateral raises are the most important exercise for broad shoulders, and also the most poorly executed. Three keys:
- Light weight, lots of control. If you swing your body to lift the dumbbell, your traps and momentum do the work. The lateral delt is small and responds best to moderate loads and 12-20 reps.
- Raise to shoulder height. Above that, the traps take over.
- Elbow slightly bent and arm a little in front of the body, in the plane of the shoulder blade, which is the most comfortable path for the joint.
Cable lateral raises keep tension in the bottom part of the range, where the dumbbell barely weighs anything, and are a great alternative or complement.
Do you need front raises?
For most people, no. As the table showed, the front delt already gets plenty of work from the bench press, incline press and shoulder press. Front raises only make sense if the front delt is clearly lagging or if you do no overhead pressing at all.
The rear delt: the forgotten one
The rear delt is the most neglected and the one that most changes how the shoulder looks from the side. It also balances out all the pressing you do during the week.
Reverse flyes and face pulls
The reverse flye, lying face down on an incline bench or bent over standing, opens the arms out to the sides with the elbows slightly bent. Reinold and colleagues (2004) measured with intramuscular electrodes that prone horizontal abduction, with the arm at 100° and external rotation, activated the rear delt at 88% of its maximum and the lateral delt at 87%, along with the supraspinatus at 82%. It is one of the few exercises that trains the rear delt and the rotator cuff at the same time.
The cable face pull, pulling the rope towards your face with high elbows and pulling the hands apart at the end, combines rear delts, middle traps and external rotators. It is the shoulder "health" exercise par excellence.
Does it help with rounded shoulders?
It is one of the most common searches. The honest answer: strengthening the rear delt, middle traps and external rotators balances the muscles that pull the shoulder back, and many people notice a more open posture. But posture also depends on thoracic mobility, habits and anatomy, and the evidence that exercise permanently "corrects" position is limited. Do it because it builds a more balanced shoulder, not expecting an immediate aesthetic change.
The best shoulder exercises at a glance
| Exercise | Main portion | Equipment | Sets × reps |
|---|---|---|---|
| Barbell overhead press | Front and lateral | Barbell | 3-4 × 5-8 |
| Seated dumbbell press | Front and lateral | Dumbbells and bench | 3 × 8-12 |
| Arnold press | Front and lateral | Dumbbells | 3 × 8-12 |
| Lateral raises | Lateral | Dumbbells | 3-4 × 12-20 |
| Cable lateral raises | Lateral | Cable | 3 × 12-15 |
| Reverse flye | Rear | Dumbbells or machine | 3 × 12-20 |
| Face pull | Rear and rotator cuff | Cable with rope or band | 3 × 12-15 |
| Front raises | Front | Dumbbells or plate | 2 × 10-12 (optional) |
How many shoulder sets per week
The relationship between volume and growth applies here too: in the meta-analysis by Schoenfeld, Ogborn and Krieger (2017), each additional weekly set was associated with 0.37% more muscle gain. For shoulders you need to count carefully:
- Front delt: if you do bench press, incline press and shoulder press, it probably already gets 10 or more weekly sets without direct work.
- Lateral delt: 10-16 weekly sets of lateral raises and presses, spread over two or three days. It tolerates high frequency well.
- Rear delt: 8-12 weekly sets between reverse flyes, face pulls and wide-elbow rows.
The guide on how many sets you need per muscle group gives the full ranges by level.
Sample shoulder routine
You do not need a dedicated shoulder day. In a push pull legs routine, presses and lateral raises go on push day and rear delt work on pull day. If you prefer a specific session, this one covers all three portions:
| Order | Exercise | Sets × reps | Rest |
|---|---|---|---|
| 1 | Barbell overhead press | 4 × 6-8 | 2-3 min |
| 2 | Seated dumbbell press | 3 × 10-12 | 2 min |
| 3 | Lateral raises | 4 × 12-20 | 60-90 s |
| 4 | Cable lateral raises | 2 × 15 | 60 s |
| 5 | Reverse flye | 3 × 12-20 | 60-90 s |
| 6 | Face pull | 3 × 12-15 | 60 s |
Shoulder exercises at home
With a pair of dumbbells or a resistance band you can cover all three portions:
- Dumbbell press standing or seated on a chair. If you have no dumbbells, the pike push-up (a push-up with your hips high) loads the front delt and triceps.
- Lateral raises with dumbbells, bottles or a band held under your feet. With a band, resistance increases at the top, the opposite of a dumbbell: combining them is a good idea.
- Reverse flyes bent forward, with dumbbells or bottles.
- Band face pulls anchored to a door or a post.
To progress at home, add reps, slow the lowering phase to three seconds and shorten your rest periods. The guide to building muscle at home explains how to organise it.
How to train your shoulders without getting injured
The shoulder is one of the most frequently injured joints in the gym. Kolber and colleagues (2010) reviewed the literature on strength training injuries and found that up to 36% of documented injuries occurred at the shoulder, with two standout risk factors: muscle and joint imbalances, and poor technique. Some simple guidelines:
- Balance pushing and pulling. For every set of pressing, at least one set of rear delt work or rowing.
- Warm up the rotator cuff with light external rotations and face pulls before heavy presses. The RAMP warm-up gives you a complete structure.
- Avoid positions that bother you, such as behind-the-neck presses or very narrow-grip upright rows. If one variation hurts, there is another that trains the same thing.
- Do not chase weight on lateral raises: clean technique pays off more than load.
If you have persistent pain, see a physiotherapist before you keep loading.
Conclusion
For complete shoulders you need three things: a press as the base for the front and lateral delts, lateral raises for width, and specific rear delt work with reverse flyes and face pulls. The front delt already gets plenty of work from pressing, so the extra effort goes to the lateral and rear delts. Around 10-16 weekly sets for the lateral delt and 8-12 for the rear delt are enough to grow. If you want the distribution to fit your routine, Progrevia's routine generator organises it for you.
- Campos YAC, Vianna JM, Guimarães MP, et al. Different shoulder exercises affect the activation of deltoid portions in resistance-trained individuals. Journal of Human Kinetics. 2020;75:5-14.
- Saeterbakken AH, Fimland MS. Effects of body position and loading modality on muscle activity and strength in shoulder presses. Journal of Strength and Conditioning Research. 2013;27(7):1824-1831.
- Reinold MM, Wilk KE, Fleisig GS, et al. Electromyographic analysis of the rotator cuff and deltoid musculature during common shoulder external rotation exercises. Journal of Orthopaedic & Sports Physical Therapy. 2004;34(7):385-394.
- Kolber MJ, Beekhuizen KS, Cheng MS, Hellman MA. Shoulder injuries attributed to resistance training: a brief review. Journal of Strength and Conditioning Research. 2010;24(6):1696-1704.
- Schoenfeld BJ, Ogborn D, Krieger JW. Dose-response relationship between weekly resistance training volume and increases in muscle mass: a systematic review and meta-analysis. Journal of Sports Sciences. 2017;35(11):1073-1082.
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Frequently asked questions
What are the best shoulder exercises?
A press (barbell overhead press or dumbbell press) for the front and lateral delts, lateral raises for width, and reverse flyes and face pulls for the rear delt. With those four you cover all three portions.
Which exercise makes shoulders wider?
Lateral raises, because they train the lateral delt, which is the one that creates width. In Campos's study (2020) it was the exercise that activated it the most, even ahead of the shoulder press.
Do you need to do front raises?
Usually not. The front delt already works a lot in the bench press, incline press and shoulder press. They are only worth it if that portion is clearly lagging.
How many shoulder sets should you do per week?
Around 10-16 weekly sets for the lateral delt and 8-12 for the rear delt, spread over two or three days. The front delt is usually covered by pressing exercises.
How do you train shoulders at home?
With dumbbells or a resistance band: standing or seated presses, lateral raises, bent-over reverse flyes and band face pulls anchored to a door. Without equipment, the pike push-up replaces the press.
Informational content based on the available scientific evidence: it does not replace advice from a healthcare professional. If you have an injury or a medical condition, or are pregnant, check with one before changing your training or diet.
