Dead bug

Muscle group

Abdomen

Primary muscles

Abs

Secondary muscles

Obliques

1. Lie on your back with your arms extended toward the ceiling and your knees bent at a 90-degree angle directly over your hips.
2. Press your lower back into the floor. Slowly lower your opposite arm and leg toward the floor at the same time. Go as low as you can without your back arching.
3. Return to the starting position with control and repeat with the other arm and leg. Continue alternating sides.