Lie on your back, knees bent 90 degrees, shins parallel to floor (tabletop position). Arms extended straight up towards ceiling.

Engage core, pressing lower back into the floor. Maintain this contact throughout.

Slowly extend your right leg straight out while simultaneously lowering your left arm straight back overhead.

Lower limbs as far as possible while keeping lower back pressed into floor.

Return right leg and left arm to starting position with control.

Repeat with left leg and right arm. Continue alternating sides.