Dead Bug
What Is the Dead Bug?
Dead Bug is an isolation exercise that primarily targets the core, while also engaging the hip flexors, lower back, shoulders, and glutes for support and stabilization. It is a beginner-level movement that builds anti-extension control and trunk stability without loading the spine.
Because you are supine, it limits cheating and helps you learn to keep the ribs and pelvis stacked while the arms and legs move. This makes it a reliable option for warm-ups, rehab phases, and teaching proper bracing for compound lifts.
Use slow, controlled reps and prioritize breathing coordination. The exercise emphasizes anterior core endurance and teaches you to resist lumbar extension as the limbs create leverage.
Choose Dead Bug when you need low-load trunk training at home or in the gym. As control improves, you can lengthen lever arms, increase time under tension, or add light external resistance while maintaining impeccable positioning.
Muscles Worked
- Rectus Abdominis (Lower)
- Primary
- Rectus Abdominis
- High
- Deltoid
- Medium
- External Oblique
- Medium
- Gluteus Maximus
- Medium
- Sartorius
- Low
- Erector Spinae
- Minimal
Instructions
- Lie on your back with arms vertical over shoulders and hips and knees bent to 90 degrees.
- Brace gently so ribs stay down and low back stays neutral against the floor.
- Inhale through the nose to fill the sides of the torso without flaring the ribs.
- On a slow exhale, lower the opposite arm and leg toward the floor, stopping before the low back lifts.
- Pause briefly, keep the pelvis still, and return to the start under control on the inhale.
- Alternate sides, moving smoothly while keeping tension through the midsection and relaxed neck/shoulders.
- Limit range to what you can control; shorten the lever if the back starts to arch or ribs flare up.
- Maintain a steady breath rhythm and consistent bracing for all reps.
Common Mistakes
Losing lumbar contact
Letting the low back lift off the floor instead of keeping ribs down and trunk braced.
Rushing the tempo
Moving the limbs quickly and using momentum instead of controlled anti-extension work.
Overreaching range
Lowering the heel or arm too far past the point of control and arching the back.
Flaring ribs
Letting the ribcage pop up which reduces abdominal engagement and stresses the spine.
Tension in neck
Craning the neck or shrugging shoulders instead of keeping the upper body relaxed.
Injuries
Dead Bug is a low risk exercise when performed with proper technique.
Discomfort typically shows up in the hip flexors or lower back when range exceeds control. Keep the ribs down, shorten the lever, and move slower if you feel strain instead of abdominal tension.
If the neck tightens, rest the head on a small pad and keep shoulders relaxed. Stop the set if the low back repeatedly lifts or if sharp pain appears; reset position and reduce range or reps.
- Primary Focus
- Core
- Equipment
- Body weight
- Modality
- Strength
- Difficulty
- Beginner
Alternative Exercises
Frequently Asked Questions
- Q: How many reps should I do?
Use 6-10 controlled reps per side for 2-4 sets, focusing on smooth breathing and trunk tension.
- Q: Should my low back be flat or neutral?
Aim for a neutral spine with ribs down. Gentle contact with the floor is fine; avoid actively jamming the back flat.
- Q: What if my hip flexors take over?
Shorten the lever, move slower, and exhale during the reach. Stop the rep just before control is lost to keep tension in the abs.
- Q: Can I add load to progress it?
Yes - hold a light dumbbell overhead or use a mini band, but only if you can maintain rib position and control for all reps.