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.
Where it fits in a workout
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.
How many sets, how heavy and how hard: see what the ACSM position stands support.
Variations and alternatives
When to talk to someone
- Chest discomfort, feeling faint or lightheaded, or trouble breathing during or after exercise can be signs of a heart attack. In the US, call 911 right away; elsewhere, call your local emergency number.
- Heart, metabolic or kidney disease, or symptoms like these when you are active: talk to your doctor before you start or step up training.
- Pregnant: ask your obstetric care provider which exercise suits you.
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More exercises
Sources
- ACSM position stand on exercise quantity and quality (Garber et al., 2011)
- ACSM preparticipation health screening (Riebe et al., 2015)
- ACOG Committee Opinion No. 804 on exercise in pregnancy (2020)
- CDC: About Heart Attack Symptoms, Risk, and Recovery (2024)
Sources checked on October 17, 2026. Full citations are in the exercise library.
Animation and exercise data: ExerciseDB, licensed to SetGrip. General information, not medical or coaching advice.