Dead Bug

The dead bug is a low-impact core exercise that teaches you to keep the trunk stable while the limbs move. Quality reps matter more than speed or a large range.

Dead Bug Setup

Choose a firm, comfortable surface and lie on your back with your head supported naturally. Place your feet flat first, then bring the hips and knees above the hips so the shins are parallel to the floor. Reach the arms toward the ceiling with the hands over the shoulders. Keep the jaw relaxed and let the back of the pelvis feel heavy. There may be a small natural gap beneath your lower back, but you should not forcefully flatten the spine by squeezing the glutes or pressing your head into the floor.

Take a slow breath in through the nose. As you exhale, let the ribs move down and gently tighten the abdominal wall as though preparing for a light tap. This is the position you want to maintain while the limbs move. The brace should be strong enough to prevent the ribs from popping up and the back from arching, while still allowing calm breathing. If you cannot find the position, practice holding the tabletop shape for three to five breaths before adding movement.

Step-by-Step Form

Start by lowering one arm behind you and extending the opposite leg away from you. Move from the shoulder and hip, keeping the other arm and leg still. The moving heel can hover just above the floor, or the knee can remain bent if a straight leg is too demanding. Exhale through the hardest part of the reach. Your goal is not to touch the floor; your goal is to keep the pelvis quiet and the lower back gently connected to the ground.

Return the arm and leg to tabletop slowly, pause to reset the ribs, then switch sides. Imagine balancing a glass of water on your pelvis. If the glass would tip, the range is too large or the speed is too fast. Use a three-second reach and a one-second pause when learning. Keep the shoulders down rather than shrugging toward the ears, and avoid pressing the limbs into the floor to create leverage.

Muscles and What the Exercise Trains

The rectus abdominis and deeper abdominal muscles help resist spinal extension as the limbs move away from the body. The obliques help keep the pelvis from rotating, while the hip flexors and shoulder muscles move and position the limbs. The dead bug is therefore less about producing a large trunk motion and more about maintaining a stable trunk while the hips and shoulders move independently. You may feel the front of the abdomen working without feeling a dramatic burn.

This anti-extension quality makes the drill useful as a warm-up, a low-impact core exercise, or a way to practice bracing before squats and hinges. It does not need to be treated as a maximal abdominal strength test. A technically clean set of six per side is more valuable than twenty fast repetitions with an arched back.

Regressions and Progressions

Regress the exercise by keeping both feet on the floor and moving only the arms, or by marching one tabletop leg at a time. You can also place your hands on your thighs and press lightly while resisting movement. These options let you learn the breathing and rib position without losing control. Progress by reaching farther, pausing with the heel near the floor, or holding a very light weight in the hands. A stability-ball dead bug adds a gentle isometric press, but it should come only after the basic pattern is repeatable.

For strength and control, use two or three sets of six to ten slow reps per side with about forty-five to ninety seconds of rest. For a warm-up, one or two sets of four to six per side is enough. For endurance, two or three sets of twelve to twenty per side can work if the brace and breathing remain unchanged. Leave a few quality repetitions in reserve rather than training until the back starts arching.

Safety and Troubleshooting

If your lower back lifts from the floor, shorten the lever: bend the knee, reduce the arm reach, or return sooner. If your neck feels strained, lower the head and keep the gaze upward. Do not aggressively flatten the spine or hold your breath to manufacture stability. Any sharp pain, tingling, or symptoms that travel into a limb are reasons to stop and seek appropriate assessment. People with a recent abdominal, hip, or spinal injury should get individual guidance before training. The dead bug should feel controlled and low impact from the first repetition to the last.

References

1. National Strength and Conditioning Association. Anaerobic and Muscle Endurance Development: Lifting Guidelines. National Strength and Conditioning Association (2017)Back to claim
2. Brad S Currier, Alysha C D'Souza, Maria A Fiatarone Singh, Caroline V Lowisz, Eric S Rawson, Brad J Schoenfeld, Abbie E Smith-Ryan, Jeremy P Steen, Gwendolyn A Thomas, N Travis Triplett, Tyrone A Washington, Timothy J Werner, Stuart M Phillips. American College of Sports Medicine Position Stand. Resistance Training Prescription for Muscle Function, Hypertrophy, and Physical Performance in Healthy Adults: An Overview of Reviews. Medicine & Science in Sports & Exercise (2026)Back to claim
3. Deborah Riebe, Barry A Franklin, Paul D Thompson, Carol E Garber, George P Whitfield, Melissa Magal, Linda S Pescatello. Updating ACSM's Recommendations for Exercise Preparticipation Health Screening. Medicine & Science in Sports & Exercise (2015)Back to claim

See our exercise methodology for how this evidence is applied and its limits.