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Single-Arm Overhead Press

A unilateral overhead press that adds significant core anti-lateral-flexion demand to the standard pressing motion.

Setup

Stand or kneel holding a single dumbbell or kettlebell at shoulder height. Core braced, opposite hand free or resting at your side.

Movement

Press the weight overhead. Resist the urge to lean toward the working side — keep your torso upright and stable. Lower with control. Maintain the same anti-lean stability throughout the descent.

Return

Switch arms after completing the set. Train both sides for balanced development.

Common Mistake to Avoid

Leaning toward the working side. If your torso tilts, your core isn't yet stabilizing the movement effectively at this load.

Equipment Dumbbell or kettlebell
Primary Muscles Shoulders (deltoids)
Secondary Muscles Core (anti-lateral-flexion), triceps

Why it matters

Pressing a single weight overhead forces your core to resist the lateral pull of the off-center load throughout the entire press, adding a significant stability challenge beyond the standard two-arm version. It also lets you directly address any side-to-side strength imbalance in your shoulders.

How to do it

  1. Stand or kneel holding a single dumbbell or kettlebell at shoulder height. Core braced, opposite hand free or resting at your side.
  2. Press the weight overhead. Resist the urge to lean toward the working side — keep your torso upright and stable.
  3. Lower with control. Maintain the same anti-lean stability throughout the descent.
  4. Switch arms after completing the set. Train both sides for balanced development.

Common mistakes

  • Leaning toward the working side. If your torso tilts, your core isn't yet stabilizing the movement effectively at this load.
  • Using too heavy a weight before the anti-lean control is solid. Master the stable, upright position with lighter weight first.
  • Neglecting the weaker side. Train both sides with equal volume rather than favoring the stronger one.
  • Rushing through reps. A controlled tempo helps maintain the stable torso position throughout, especially under fatigue.

Sets & reps by level

Beginner

Not typically recommended — master the two-arm dumbbell press first.

Intermediate

3 sets of 6–8 reps per arm with light weight, prioritizing stability over load.

Advanced

3–4 sets of 8–10 reps per arm at a more challenging weight, strict control throughout.

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