Exercise
DEAD BUG
Form cues
About
The Dead Bug is the gold-standard core stability exercise recommended by physical therapists and strength coaches for its ability to train anti-extension control — preventing the lower back from arching as the limbs move. Performed supine with the spine held in a constant neutral position, it develops the deep stabilizers (transverse abdominis and multifidus) that protect the spine under load, directly transferring to every other lift and athletic movement.
Instructions
Step-by-step technique
Start position
Lie flat on your back. Raise both arms perpendicular to the floor, fingers pointing at the ceiling. Lift both knees to 90 degrees — shins parallel to the floor.
Arms up, knees at 90°Flatten the lower back
Press your lower back firmly into the floor, eliminating any gap between your lumbar spine and the mat. Maintain this contact throughout every single rep — if you lose it, you have gone too far.
Lower back pressed flat — never leave thisExhale and extend
Exhale fully while simultaneously lowering your right arm overhead toward the floor and extending your left leg straight out in front of you, lowering it toward (but not touching) the floor.
Opposite arm and leg together on the exhaleCheck the back
Pause 1–2 seconds at the extended position with your lower back still pressed flat. If it has lifted, reduce your end range — stop higher until strength improves.
Verify back contact before returningReturn and alternate
Inhale as you return both limbs to starting position. Then exhale and extend the opposite pair — left arm and right leg.
Inhale to return, exhale to extendCommon mistakes
What goes wrong — and why
Lower back arching off the floor
When the lower back lifts, the core has lost control of the pelvis and the lumbar spine is being forced into extension — exactly what the exercise is designed to prevent.
Shorten the range of motion immediately. Extend limbs only 60–70% of the way and rebuild from there over weeks, not days.
Moving same-side arm and leg
Extending the right arm and right leg together is much easier but eliminates the rotational stability demand that is the entire point of the Dead Bug.
Always pair opposite arm and opposite leg. Use a mirror to confirm if unsure.
Holding the breath
The Dead Bug is specifically designed as a breathing exercise — the full exhale drives the intra-abdominal pressure needed to protect the spine. Breath-holding defeats the mechanism.
Time your exhale to coincide exactly with the limb extension. Inhale as you return.
Moving too fast
Speed removes the challenge — at high velocity the hip flexors take over leg lowering rather than the core controlling the pelvis.
Use a 4-count down, 1-second pause, 4-count return tempo. The slowness is the actual exercise.
Variations · Progressions · Regressions
Adaptations for every level
Dead Bug (Arms Only)
Keep the feet flat on the floor and alternate only the arms overhead. Significantly reduces the stability demand while building the breath-to-movement pattern needed for the full version.
Dead Bug with Ball Press
Place a stability ball between one knee and the opposite arm and press firmly against it as you extend the other arm and leg. Adds reciprocal inhibition to deepen core activation.
Weighted Dead Bug
Hold a light dumbbell (2.5–5 kg) in the extended arm to increase the moment arm and demand more from the core stabilizers.