How many sets and reps of the dead bug should a beginner do?

Start with 3 sets of 8 to 10 reps per side, moving slowly enough that you could stop at any point without your low back lifting. If you can't keep the low back flat for that many, cut the range of the reaching arm and leg rather than the rep count. Add range, not speed, as it gets easier.

What can I do instead of the dead bug if I want it easier or harder?

There's no equipment needed here, so scale it instead: for easier, move just the legs and keep both arms reaching up the whole time, or shorten how far the leg lowers. For harder, add a light dumbbell overhead or extend both a straight leg and the opposite arm all the way to the floor before returning.

What is the dead bug good for and when is it not the right choice?

It teaches the core to keep the spine still and flat while the limbs move independently, a skill that transfers to lifting, running, and everyday movement with very little injury risk. It is a poor choice as a sole ab exercise for someone who already has strong core control; at that point it becomes a warm-up, not a real challenge.

Beginner

Dead Bug

The dead bug teaches the core to stay braced and the low back to stay flat while the arms and legs move independently. That anti-extension control transfers directly to lifting, running, and everyday movement, and it does so with almost no risk to the spine. It is an ideal starting point for building real core stability.

Equipment: Body Weight
Body part: Abs
Type: Functional, Strength
Browse by muscle: Lower Rectus Abdominals
Browse by movement: Core Brace

How to do it

1
Lie on your back with arms reaching toward the ceiling and hips and knees bent to ninety degrees.
2
Press your low back into the floor and brace your abs.
3
Slowly lower one arm overhead and the opposite leg toward the floor.
4
Stop just before your low back lifts off the ground.
5
Return to the start and repeat with the other arm and leg.
6
Move slowly and keep the core braced throughout.

Tips

Keep your low back glued to the floor; that contact is the whole exercise.
Exhale as you extend the limbs to help lock the ribcage down.
Shorten the range if your back lifts, and extend it as you get stronger.

Variations

Common mistakes

The lower leg drops all the way to the floor before the low back has a chance to lift, which hides the exact moment control is lost.
Rushing through the reps turns the exercise into a fast bicycle-like motion instead of a slow, controlled extension.
The ribcage flares up and out as the arm reaches overhead, arching the mid-back even while the lower back looks flat.
Some beginners move the arm and leg on the same side together instead of opposite limbs, which changes the drill into a different, less balanced pattern; reach with the opposite arm and leg unless you are deliberately doing the same-side variation.
Once the tenth or eleventh rep hits, the low back quietly lifts off the floor and nobody notices because the earlier reps looked fine.

Frequently asked

How many sets and reps of the dead bug should a beginner do?: Start with 3 sets of 8 to 10 reps per side, moving slowly enough that you could stop at any point without your low back lifting. If you can't keep the low back flat for that many, cut the range of the reaching arm and leg rather than the rep count. Add range, not speed, as it gets easier.
What can I do instead of the dead bug if I want it easier or harder?: There's no equipment needed here, so scale it instead: for easier, move just the legs and keep both arms reaching up the whole time, or shorten how far the leg lowers. For harder, add a light dumbbell overhead or extend both a straight leg and the opposite arm all the way to the floor before returning.
What is the dead bug good for and when is it not the right choice?: It teaches the core to keep the spine still and flat while the limbs move independently, a skill that transfers to lifting, running, and everyday movement with very little injury risk. It is a poor choice as a sole ab exercise for someone who already has strong core control; at that point it becomes a warm-up, not a real challenge.

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