Dumbbell · intermediate · chest
Dumbbell incline bench press alternate arm
Also called Alternating incline press, Single arm incline press, Alternate arm incline bench, Alternating incline dumbbell press.
On an incline bench, with a dumbbell in each hand, you press one arm at a time while the other stays down at chest height, then swap. Your chest does the pressing, biased toward the upper portion because of the incline. What this version adds is that the load is never even: one side is pressing while the other is holding, so your trunk spends the whole set stopping you rotating toward the working arm.
How to do it
- Step oneSet an incline bench to 30-45 degrees and lie back holding a dumbbell in each hand at chest height.
- Step twoPress one arm upward until fully extended while keeping the other dumbbell at chest level.
- Step threeLower the extended arm back to chest height, then press the opposite arm upward.
- Step fourAlternate arms in a controlled manner.
- Step fiveKeep your core engaged and avoid rotating your torso throughout the movement.
What usually goes wrong
Your torso turns slightly toward whichever arm is pressing.
WhyOnly one side is loaded at a time, so there is a turning force on you for the whole set and your body will follow it unless something stops it.
FixKeep both shoulder blades flat against the bench and both hips square, and think of your ribcage as staying still while your arm moves. If you cannot stop the turn, the weight is past what the rest of you can anchor.
The resting arm drifts down or wanders while the other one presses.
WhyTreating the bottom position as a rest. It is not, it is a hold, and it is half of what makes this different from pressing both arms together.
FixKeep the waiting arm parked at chest height with the elbow in the same place every time. If it sinks, that side is already fatigued and the set is done.
The shoulder on the holding side starts to feel exposed.
WhyThe shoulder blade on that side has come loose. Sitting partly upright makes them harder to keep pinned, and holding a static load makes it harder still.
FixSet both shoulder blades back and down into the bench before you start, and reset them between sides rather than between sets.
You can press nearly your two-arm weight per hand and it feels wrong.
WhyYou are almost certainly rotating into each press without noticing, which lets your torso contribute.
FixTake weight off until you can press one side with the other shoulder still flat. The number should be lower here, and if it is not, something other than your chest is doing the work.
What it is for
The incline bench press alternate arm targets the upper chest by pressing one arm at a time on an incline bench. Alternating arms challenges core stability and anti-rotation strength while maintaining consistent upper chest and shoulder engagement.
Questions people ask
- What does pressing one arm at a time add?
- A turning force. With one side loaded and one side holding, your trunk has to stop your torso rotating for the whole set. That is the only thing this version does that pressing both arms together does not.
- Is the resting arm supposed to hold the weight?
- Yes. It waits at chest height with the weight loaded, which is a hold rather than a rest. That is why a set of alternating presses is much harder than the same number of two-arm presses.
- What bench angle should you use?
- The same band that suits any incline press, somewhere between about 30 and 45 degrees. Shallower does measurably less for the upper chest and steeper starts handing the work to your front delts.
- Will this fix a strength difference between my arms?
- We have found nothing establishing that, so we will not claim it. What working one arm at a time does do is make a difference visible, because a weaker side can no longer be carried by a stronger one.
- Should the weight be lighter than a two-arm press?
- Per hand, yes, noticeably. If it is not, you are probably rotating into each rep and letting your torso help. Pressing with your shoulder blades flat is the test.