Decline Single Arm Dumbbell Bench Press
In SetGrip: Dumbbell Bench Press (Decline, Single Arm)
One dumbbell at a time on a decline bench forces your trunk to resist rolling toward the loaded side, so the obliques work almost as hard as the chest. Use it to expose and correct a weaker arm after bilateral pressing, keeping the load at roughly half of what you would use for the two-dumbbell decline press.
How to do the Decline Single Arm Dumbbell Bench Press
- Lie on a decline bench with a dumbbell in one hand, resting on your chest.
- Place your feet flat on the ground and keep your back pressed against the bench.
- Extend your arm and push the dumbbell up towards the ceiling, fully extending your elbow.
- Pause for a moment at the top, then slowly lower the dumbbell back down to the starting position.
- Repeat for the desired number of repetitions, then switch to the other arm.
Tip: Squeeze the bar hard and bend it toward your feet to keep the elbows in and the lats tight.
Muscles worked
Primary
Pectorals · Chest
The pecs press the arms together and forward and are worked hardest at the bottom of the rep when the elbows are below the body.
Common mistakes
- Elbows flared to 90 degrees — this puts the shoulder in a poor position at the bottom; tuck the elbows to about 45 to 60 degrees and touch the bar on the lower chest.
- Losing shoulder blade position — the shoulder blades should be pulled back and down before the unrack and stay there; if they roll forward, the chest loses leverage.
- Bouncing off the chest — control the bar to a light touch and pause for a beat before pressing; a bounce hides how much you can actually press.
- Feet dancing around — plant the feet flat and drive them into the floor for the whole set to keep the body tight.
Sets, reps and where it fits
| Goal | Sets × reps | Rest |
|---|---|---|
| Strength | 4–5 × 3–6 per side | 2–3 min |
| Muscle growth | 3–4 × 6–12 per side | 90–120 s |
| Endurance | 2–3 × 12–20 per side | 60 s |
Bench press goes first in a chest or push session when you are strongest. Superset with a dumbbell row on the same bench for a push and pull pair, or follow it with flies for volume.
Variations and alternatives
Similar exercises
Without dumbbell
Frequently asked questions
What muscles does the Decline Single Arm Dumbbell Bench Press work?
The Decline Single Arm Dumbbell Bench Press primarily works the pectorals. It also involves the triceps and delts, which assist the movement and stabilise the joints.
Is the Decline Single Arm Dumbbell Bench Press good for beginners?
It is rated intermediate, so it suits people who already train regularly. Beginners can still do the Decline Single Arm Dumbbell Bench Press with light load and a spotter or coach watching the first few sessions; if it feels awkward, pick an easier variation from the alternatives below first.
What can I do instead of the Decline Single Arm Dumbbell Bench Press?
If you cannot do the Decline Single Arm Dumbbell Bench Press, try the Decline Barbell Bench Press, the Barbell Bench Press or the Incline Barbell Bench Press. Each of them trains the pectorals through a similar movement, so you can swap them in without changing the rest of the workout.
How many sets and reps should I do?
It depends on your goal. For the Decline Single Arm Dumbbell Bench Press, a sensible starting point is strength: 4–5 × 3–6 per side with 2–3 min rest; muscle growth: 3–4 × 6–12 per side with 90–120 s rest; endurance: 2–3 × 12–20 per side with 60 s rest. Put it early in the session while you are fresh, before isolation work for the same muscles.
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