How to Do the Dead Bug

How to do it

1. Lie flat on your back on the floor with your arms pointed straight toward the ceiling, directly over your shoulders, and your hips and knees both bent to 90 degrees so your shins are parallel to the floor, like a tabletop shape with your legs.
2. Press your lower back firmly into the floor by exhaling and drawing your ribcage down, creating full contact between your lumbar spine and the ground before any movement begins.
3. Brace your core hard enough to maintain that lower-back contact throughout the entire set, treating this brace as the non-negotiable constant rather than something you turn on and off.
4. On an exhale, slowly extend your right leg out until it hovers just above the floor while simultaneously lowering your left arm overhead until it is just above the floor, keeping both limbs long and controlled the whole way down.
5. Pause at the bottom position for a breath, confirming your lower back has stayed flat and your opposite arm and leg are still locked in their starting position without drifting.
6. Reverse the movement by bringing your right leg and left arm back to the starting position, then repeat the reach on the opposite side by extending your left leg and lowering your right arm overhead.
7. One repetition counts as both sides completed; reset your brace and lower-back contact before initiating the next rep rather than rushing through it.
8. Keep your neck relaxed throughout and resist the urge to tuck your chin hard or shrug your shoulders up toward your ears during the reach.

Form cues

• Ribs down, back flat before you move anything.
• Breathe out on the reach, brace stays on.
• Slow it down. Half your current speed.
• Opposite arm and leg stay dead still.
• Heel nearly grazes the floor, do not touch it.

Common mistakes

• Losing lower-back contact mid-rep: when the lumbar spine arches up off the floor as the leg extends, the whole anti-extension challenge disappears and the hip flexors take over from the core. Fix this by shortening the range, only lowering the leg as far as you can without the back lifting.
• Holding the breath: breath-holding spikes intra-abdominal pressure in a way that masks poor bracing and prevents you from learning the skill. Exhale on the way out and practice maintaining stability while breathing.
• Moving too fast: speed hides compensation. A dead bug rep that takes two seconds looks totally different from one that takes six; the slower version reveals whether you actually have the motor control or are just swinging through it.
• Letting the opposite limbs drift: the resting arm or leg creeps away from the starting position because the lifter is focused on the moving limbs and not actively holding the other side still. Both sides of the core need to be working simultaneously.
• Overusing the neck and shoulders: craning the head up or shrugging the arms aggressively is a sign of global tension rather than targeted core stability. Consciously relax the neck and keep the shoulders packed down and back throughout.

Why do the Dead Bug?

• Because the spine stays completely supported by the floor, the dead bug allows lifters with existing lower-back sensitivity to train core stability without loading the spine or creating shear, making it accessible in situations where planks or sit-ups are uncomfortable.
• The movement directly trains the coordination between the hip flexors and core that is required to brace under a barbell. Lifters who add dead bugs often notice improved tightness and control in the bottom position of squats and the lockout of deadlifts.
• The contralateral pattern, right arm with left leg, reinforces the diagonal connections across the trunk that underlie rotational sports performance, sprinting mechanics, and any throw or strike pattern.
• Steady breathing under a maintained brace is a skill, and the dead bug trains it explicitly. That controlled-breathing-while-braced quality transfers to almost every compound lift where the Valsalva has to eventually end and the core must stay engaged through the breath cycle.

Dead Bug variations

Bent-Knee Arm-Only Dead Bug

Both feet stay planted on the floor while only the arms extend overhead alternately, cutting the coordination demand in half and making it the right starting point for anyone who cannot keep the lower back flat during the full version.

Heel-Tap Dead Bug

Instead of hovering the foot above the floor, the heel taps down gently on each rep, providing brief tactile feedback and slightly reducing the isometric demand, useful during early rehab or when learning the pelvic position.

Dead Bug with Foam Roller

A foam roller is pressed between the bent knee and the opposite forearm, requiring both sides to actively push into the roller throughout the rep, which amplifies the anti-rotation and midline activation demands significantly.

Dead Bug with Band Pull-Apart

A resistance band is held taut between both hands at the ceiling and maintained under tension throughout the movement, adding shoulder stability and lat engagement to the anti-extension challenge for lifters ready for an additional coordination layer.

How to program it

The dead bug is almost universally placed at the start of a session as part of a warm-up or activation block, where a few focused sets prime the core before heavy compound work. Many coaches and lifters also use it at the end of a session as accessory work, typically in the range of 3 to 5 controlled reps per side for 2 to 3 sets, where quality matters far more than volume. Because the benefit comes entirely from controlled execution, people rarely push it beyond moderate rep counts. It appears most commonly in powerlifting warm-up protocols, physical therapy progressions, and athletic conditioning programs where spinal stability under movement is a priority.

Dead Bug alternatives

Hanging Leg Raise

Bodyweight · Isolation

Decline Sit-Up

Bodyweight · Isolation

Lying Leg Raise

Bodyweight · Isolation

V-Up

Bodyweight · Isolation

Flutter Kicks

Bodyweight · Isolation

Knee Tuck

Bodyweight · Isolation