The single arm dumbbell French press is a triceps isolation exercise performed standing with one dumbbell held overhead and lowered behind the head to train the long head of thetriceps. With one arm at a time, the upper arm sits fully vertical beside the head with no second dumbbell in the way, so the elbow bends deeper than in the two-hand version, and the trunk has to resist bending toward the loaded side. The free hand can steady the working elbow. Lifters use it as a second triceps movement on an arm or push day.
What Muscles Does the Single Arm Dumbbell French Press Work?
- Primary: Triceps brachii (long head)
- Secondary: Triceps brachii (lateral and medial heads), anconeus
- Tertiary: Deltoids, obliques, serratus anterior, wrist flexors
How Do You Set Up for the Single Arm Dumbbell French Press?
Stand with your feet hip-width apart and a light dumbbell in one hand. Press it overhead until the arm is straight and the upper arm points at the ceiling, biceps beside the ear, palm facing forward. Brace the abs so the ribs stay down and the lower back does not arch. Rest the free hand on your hip or against the working elbow.
How Do You Perform the Single Arm Dumbbell French Press?
- Lock the upper arm vertical, elbow pointing forward and up, and set the shoulder down away from the ear.
- Bend the elbow and lower the dumbbell behind the head, keeping the upper arm still and the palm facing forward.
- Stop when the forearm touches the biceps or the dumbbell reaches the base of the neck, whichever comes first.
- Pause for one count at the bottom with the triceps under stretch and the elbow still pointing at the ceiling.
- Press the dumbbell back overhead by straightening the elbow, without letting the upper arm drift forward.
- Finish with the arm straight and the shoulder set, then reset the brace for the next rep; switch arms after the set.
What Are the Key Form Cues?
- Keep the elbow pointed at the ceiling: the upper arm stays vertical and only the forearm moves, so the long head does the work.
- Ribs down, hips square: brace against the side bend the offset load invites, so the torso stays a still column under the weight.
- Feel the stretch behind the upper arm before you start pressing.
- Drive the knuckles toward the ceiling on the way up.
- Keep the wrist neutral and the dumbbell handle vertical at the bottom.
What Are the Most Common Mistakes?
- Loading a dumbbell sized for a two-hand press: the upper arm drops forward and the shoulder takes over, so use a weight you can lower under control for the full range.
- Letting the elbow flare out: the load leaves the triceps and the shoulder rotates, so keep the elbow beside the head.
- Bending the torso away from the working arm: the obliques carry the rep and the stretch shortens, so brace and stay upright.
- Cutting the descent short: the long head never reaches its stretched position, so lower until the forearm touches the biceps.
- Snapping the elbow straight at the top: the joint takes the load with the triceps relaxed, so finish the extension under tension and stop just short of a hard lockout.
What Are the Best Single Arm Dumbbell French Press Variations?
- Seated single arm dumbbell French press: the bench removes the balance demand for lifters who cannot keep the torso still.
- Two-hand dumbbell French press: both hands cup one heavier dumbbell, for loading the long head harder.
- Incline French Press: the back rest sets the arms behind the body with less overhead demand on the shoulder.
- Alternating single arm French press: one rep each side in turn, so the trunk switches sides every rep.
- Single arm cable overhead extension: a low pulley replaces the dumbbell and keeps tension at the top.
How Do You Progress the Single Arm Dumbbell French Press?
- Move up 5 pounds once every rep of every set reaches full stretch with the upper arm vertical.
- Build from 10 reps toward 15 a side before each weight jump.
- Add a fourth set once three sets no longer fatigue the triceps at the bottom.
- Add a two-second pause at the stretched bottom, or a four-count lowering, before the next load increase.
How Should You Program the Single Arm Dumbbell French Press?
Place the single arm dumbbell French press late in a push or arm session, after presses and a heavier two-hand extension, once or twice a week. Work 3 sets of 10 to 15 reps a side with 45 to 60 seconds of rest, starting with the weaker arm. Pair it with a pressdown or a kickback so the long head and the lateral head both get direct work.
