Dead Bug

The dead bug is a kettlebell anti-extension core exercise. Lying on the back, the bell is held overhead in two hands with the arms locked. One leg extends and lowers slowly while the lumbar spine stays pressed to the floor, then the legs alternate. The exercise trains anti-extension and leg-lowering control without lumbar arch. Used in the Kettlebell Complex protocol as a core finisher across the conditioning, power, and strength sessions.

Mechanics and load path

Start flat on the back, knees stacked over hips at ninety degrees, bell pressed overhead in two hands with the arms locked. Extend and lower one leg toward the floor over a three-second count, then return under control and alternate sides. The lower back stays flat against the floor through the full range.

The failure mode is a lumbar arch. When the lower back lifts off the floor, the load transfers from the deep anterior brace onto the spinal extensors. The anti-extension purpose is then lost. The overhead bell raises the demand on the anterior chain, so the load stays light at eight to twelve kilograms.

In the Kettlebell Complex protocol

Dead bug runs as a core-finisher station across the Conditioning Flow, Power Endurance, and Strength and Stability sessions, held for a work interval against the session-weight bell, the overhead anchor favoring control over load. It pairs with movements like the Pallof Press and hollow-body holds.

In the Kettlebell Strength protocol

Program 02 uses the dead bug in the Ballistic Power finisher, paired with the windshield wiper. After a day of fast hip extension, the slow anti-extension hold restores the brace and resets the trunk. Two rounds at a light feel, the overhead bell favoring control over load.

Used in: Program 01 — Kettlebell Complex · Program 02 — Kettlebell Strength · Program 03 — Kettlebell Hypertrophy