Dead Bug: How to Do It Correctly

Step-by-step form

1. Setting up

   Lie supine on the floor and press your lumbar spine firmly into the mat, eliminating the arch. Bring both hips to 90° of flexion with shins parallel to the floor in a 'tabletop' position. Extend both arms directly above the shoulders with elbows straight, pointing toward the ceiling. Keep the cervical spine neutral with eyes directed upward.

2. The movement

   Simultaneously lower your right arm overhead toward the floor and extend your left leg, bringing it to approximately 5 cm above the ground. The descent phase should take 3 seconds, maintaining full control throughout. Return both limbs to the starting tabletop position over 2 seconds. One complete repetition consists of both the right-arm/left-leg and left-arm/right-leg cycles.

3. What stays in line

   The extending knee should remain in slight flexion (approximately 10°) rather than locking out fully during the movement. The shoulder joint must stay depressed — avoid letting the scapula shrug toward the ear as the arm descends overhead. The pelvis must not anteriorly tilt; both anterior superior iliac spines (ASIS) should remain level throughout each repetition.

4. Breathing

   Immediately before initiating movement, perform a 1-second forceful exhale to activate the diaphragm and set intra-abdominal pressure. Exhale steadily over 3 seconds as the arm and leg lower away from the body. Inhale gently over 2 seconds during the return phase. Maintain a brief 0.5-second breath hold at the transition point between limb pairs to sustain intra-abdominal pressure.

Common mistakes

1) Lumbar lifting off the mat: Place your hand under your lower back during reps — if it slides through freely, the spine has lost contact with the floor. 2) Momentum-driven movement: If the arm or leg drops rather than being lowered with resistance, the eccentric phase is being skipped; each phase must take a minimum of 3 seconds. 3) Breath-holding (Valsalva effect): If you notice facial flushing or head pressure, the exhale has been interrupted — monitor that airflow continues steadily throughout the descent.

Recommended sets and reps

Recommended sets and reps

Beginner: 5 reps × 2 sets (unilateral, one limb at a time); intermediate: 8 reps × 3 sets (bilateral, full contralateral pattern); advanced: 12 reps × 4 sets (bilateral, at 4-2-3-0 tempo).

Tempo

Prescribed tempo: 3-1-2-0. Lower the arm and leg over 3 seconds, pause at the fully extended position for 1 second, return to the tabletop position over 2 seconds, and transition immediately to the next repetition with 0 seconds at the top. Advanced practitioners can progress to a 4-2-3-0 tempo.

How often

3–4 sessions per week is appropriate, with a minimum of 24 hours recovery between sessions. Beginners in the neuromuscular learning phase should limit frequency to 2 sessions per week with at least 48 hours between sessions to allow motor pattern consolidation.

What it trains

Measurably increases lumbar anti-extension endurance by repeatedly challenging the spine against an extension moment arm. Contralateral limb coordination directly transfers to the cross-body gait pattern used in running and walking. TVA activation documented in EMG studies reduces lumbar paraspinal loading during prolonged sitting, lowering postural fatigue.

If something hurts

Knee

Knee pain during the dead bug is most often caused by patellofemoral compression when the hip flexes beyond 90° in the tabletop position, loading the knee joint. Reduce the hip angle to approximately 70–75° to lessen knee flexion. Stop the exercise immediately if pain is sharp or persistent and consult a medical professional.

Lower back

Lower-back pain during this exercise almost always indicates lumbar spine lift-off and loss of pelvic posterior tilt, which compresses the L4-L5 and L5-S1 discs. Shorten the range by not lowering the leg as close to the floor — maintain 30–40 cm clearance instead of 5 cm. Stop the exercise immediately if pain is sharp or persistent and consult a medical professional.

Shoulder

Shoulder pain during the overhead arm lowering phase is commonly linked to scapular dyskinesis — insufficient upward scapular rotation — or approaching the end range of glenohumeral mobility. Limit the arm's descent to a 45° angle from vertical rather than reaching full overhead extension. Stop the exercise immediately if pain is sharp or persistent and consult a medical professional.

When to skip it

Acute lumbar disc herniation (L3-S1 levels): the posterior pelvic tilt position may aggravate symptoms. Active sacroiliac joint dysfunction: asymmetric pelvic loading can increase pain. Severe shoulder impingement syndrome (grade 2–3): the overhead arm lowering phase triggers subacromial compression. Recent abdominal surgery (within 8 weeks): elevated intra-abdominal pressure during execution may compromise incision integrity.

Where to go next

Moves that train the same thing — and, where this one sits on a ladder, the rungs either side of it.

• Hollow Hold→
• Plank→
• Push-Ups→
• Squats→
• Glute Bridge→
• Mountain Climbers→