How to Do One-Arm Side Laterals
Start and end of one clean rep of One-Arm Side Laterals.
Quick facts
| Primary muscle | Shoulders |
|---|---|
| Secondary muscles | — |
| Equipment | Dumbbell |
| Category | Strength |
How to perform One-Arm Side Laterals
- Pick a dumbbell and place it in one of your hands. Your non lifting hand should be used to grab something steady such as an incline bench press. Lean towards your lifting arm and away from the hand that is gripping the incline bench as this will allow you to keep your balance.
- Stand with a straight torso and have the dumbbell by your side at arm's length with the palm of the hand facing you. This will be your starting position.
- While maintaining the torso stationary (no swinging), lift the dumbbell to your side with a slight bend on the elbow and your hand slightly tilted forward as if pouring water in a glass. Continue to go up until you arm is parallel to the floor. Exhale as you execute this movement and pause for a second at the top.
- Lower the dumbbell back down slowly to the starting position as you inhale.
- Repeat for the recommended amount of repetitions.
- Switch arms and repeat the exercise.
Muscles worked
- Shoulders (primary): raises and rotates the arms and drives everything overhead.
Sets & reps by goal
| Goal | Sets × reps | Load | Rest |
|---|---|---|---|
| Strength | 3–5 × 3–5 | Heavy (~85%+) | 2–3 min |
| Hypertrophy | 3–4 × 8–12 | Moderate (~65–75%) | 60–90 s |
| Endurance | 2–3 × 15–20 | Lighter (~50–60%) | 30–45 s |
Pick the row that matches your goal. If you're newer, anchor in the hypertrophy range while you groove the form.
Form tips
- Keep the ribs down and the glutes tight so the lower back doesn't arch to 'help' the weight up.
- Each side works on its own, so match the depth and speed of both arms and don't let the stronger side take over.
- Treat every rep the same — a repeatable setup and bar path is what lets you add weight safely over time.
- Warm up the pattern with a couple of lighter, submaximal sets before your working sets.
Common mistakes
- Pressing with the lower back arched instead of a braced, stacked torso.
- Letting the dumbbells drift apart or clang together at the top instead of controlling the path.
- Chasing weight jumps before the current load feels solid on every rep.
Frequently asked questions
What muscles does One-Arm Side Laterals work?
One-Arm Side Laterals is a focused movement that primarily works the shoulders.
What equipment do I need for One-Arm Side Laterals?
One-Arm Side Laterals needs a pair of dumbbells.
How many sets and reps should I do for One-Arm Side Laterals?
It depends on your goal: about 3–5 sets of 3–5 heavy reps for strength, 3–4 sets of 8–12 for muscle growth, or 2–3 sets of 15–20 for endurance. Pick the row that matches your goal. If you're newer, anchor in the hypertrophy range while you groove the form.
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