Exercise library
Dead Bug
A step-by-step guide to the dead bug: correct setup, the breathing pattern that makes it work, the four faults that ruin it, and six progressions.
How to do the dead bug
- 01Lie on your back with hips and knees bent to 90 degrees, arms reaching straight at the ceiling.
- 02Press your lower back flat into the floor and hold it there. This position is the exercise — everything else is a test of whether you can keep it.
- 03Exhale as you slowly straighten your right leg toward the floor and lower your left arm overhead.
- 04Stop the moment your lower back begins to arch away from the floor.
- 05Inhale as you return to the start, then repeat on the opposite side.
Coaching cues
- Ribs down, not flared — think about closing the gap between your bottom ribs and hip bones.
- Exhale on the reach. The exhale is what keeps your ribcage locked down.
- Move at a three-second count. Speed hides the exact failure you are training against.
Common mistakes
FaultLower back arches off the floor
FixShorten the range. Lower the leg only as far as you can hold the flat-back position, then extend range over weeks.
FaultHolding your breath
FixBreath-holding creates stiffness that masks the work. Exhale through every reach.
FaultRushing the reps
FixThree seconds out, three seconds back. Six controlled reps beat twenty fast ones.
The dead bug looks like a beginner movement and gets programmed like one. That is why most people get nothing out of it.
The exercise is not the arm and leg motion. The exercise is holding your lower back flat against the floor while your limbs try to pull it into an arch. If your back lifts, you did a limb movement, not a dead bug.
How to do the dead bug
Set up with your hips and knees stacked at ninety degrees and your arms pointing straight up. Before you move anything, press your lower back into the floor hard enough that you could not slide a hand underneath it.
That flat-back position is the whole exercise. Reach the opposite arm and leg away slowly, stop the instant your back starts to lift, and come back.
Why the breathing pattern matters
Exhaling as you reach pulls your ribcage down and puts the abdominal wall in a position where it can actually generate tension. Inhale on the reach and your ribs flare, your back arches, and the movement becomes a hip flexor stretch.
Common faults
Most failures come from doing too much range too early. Lower only as far as you can hold position, and add range as control improves.
Progressions
Once you own eight slow reps per side, load it: hold a light plate overhead, add a resistance band, or move to a hollow body hold.
Common questions
What muscles does the dead bug work?
Primarily the deep anterior core — the transverse abdominis, rectus abdominis and internal obliques — working isometrically to resist lumbar extension. The hip flexors work dynamically to control the descending leg.
How many dead bugs should I do?
Two to three sets of six to eight slow reps per side. It is a control exercise, not a conditioning one; once you can do twenty reps easily you should progress to a harder variation rather than adding volume.
Is the dead bug safe with lower back pain?
It is one of the more commonly prescribed core exercises for people with non-specific lower back pain because it loads the core without spinal flexion. Clear it with your clinician first if you have a diagnosed condition.
Swap it out
Same training effect, different demand on the joints.