BYT

Brace · Bodyweight · Learn first

Dead bug

On your back, arms toward the ceiling, hips and knees at 90°.

Dead bug
  1. 1Press the low back into the floor and keep it there.
  2. 2Reach the opposite arm and leg long, slowly.
  3. 3Return and switch. The ribs stay down.

Easy to miss: Arching the back off the floor as the leg reaches.

Muscles

Copper on the figure is a prime mover. The softer tone helps.