Dead Bug
- Primary muscleAbs
- EquipmentBodyweight
- DifficultyBeginner
- TypeCore · Core stability
- Secondary muscles
- Hip Flexors, Spine
- Body part
- Core
- Laterality
- Bilateral (both sides together)
- Category
- Strength
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Opposite arm and leg lower toward the floor while your lower back stays glued to it, and holding that flat-back position is the entire point. As a lying anti-extension drill, it trains the same resistance to arching that a rollout demands at a fraction of the difficulty, which makes it the right first rung on that ladder.
How to do the Dead Bug
- Lie flat on your back with your arms extended towards the ceiling.
- Bend your knees and lift your legs off the ground, creating a 90-degree angle at your hips and knees.
- Engage your core and lower back to press your lower back into the ground.
- Slowly lower your right arm and left leg towards the ground, keeping them straight and hovering just above the floor.
- Pause for a moment, then return to the starting position.
- Repeat the movement with your left arm and right leg.
- Continue alternating sides for the desired number of repetitions.
Tip: Exhale slowly as you roll out and keep the ribs pulled down toward the pelvis the entire time.
Muscles worked
Primary
Abs · Core
The abs work almost entirely to resist extension, holding the pelvis tucked as the lever gets longer; the tension should be highest at the far point of the rollout, not on the way back.
Secondary
- Hip Flexors — The hip flexors assist in keeping the hips from folding; if you feel them more than the abs, you are reaching too far too soon.
- Spine
Common mistakes
- Hips sagging at the bottom — if your lower back arches as the wheel rolls out, you have gone past the range your abs can control; shorten the rollout and stop at the point where your hips still stay tucked.
- Hinging at the hips — pushing your backside back toward your heels on the return turns it into a hip hinge; keep the hips locked in line with the torso and pull with the abs.
- Reaching with the arms — leading with the arms turns it into a lat exercise; think of moving the whole body as one rigid plank that happens to lengthen.
- Skipping the posterior tilt — before you roll, squeeze the glutes and tuck the pelvis slightly so the abs are braced before the load arrives.
Sets, reps and where it fits
| Goal | Sets × reps | Rest |
|---|---|---|
| Strength | 3 × 8–12 | 60 s |
| Endurance | 2–3 × 15–25 | 45 s |
Rollouts belong toward the end of a session, after heavy lifts but while you can still brace well. Superset them with hanging knee raises or a plank variation so the core work is done in one block.
Variations and alternatives
Frequently asked questions
What muscles does the Dead Bug work?
The Dead Bug primarily works the abs. It also involves the hip flexors and spine, which assist the movement and stabilise the joints.
Is the Dead Bug good for beginners?
Yes. The Dead Bug is rated beginner: it uses no equipment beyond your bodyweight and the movement is simple to learn. Start light, focus on the full range of motion and add load once every rep looks the same.
What can I do instead of the Dead Bug?
If you cannot do the Dead Bug, try the Machine Seated Crunch, the Band Assisted Ab Wheel Rollout or the Leg Raise Machine Seated Crunch. Each of them trains the abs 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 Dead Bug, a sensible starting point is strength: 3 × 8–12 with 60 s rest; endurance: 2–3 × 15–25 with 45 s rest. Train it at the end of a session or pair it with a lower-body lift as active rest.
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