Lie flat on back, knees bent, feet flat.

Hands lightly behind head, elbows wide.

Engage core. Exhale, lift shoulders off floor.

Simultaneously twist torso, bringing one elbow (e.g., right) towards opposite knee (left).

Optional: Lift opposite knee towards elbow.

Focus on oblique contraction.

Inhale, slowly lower back to start.

Repeat on other side. Continue alternating.