Start on all fours with your hands under your shoulders and knees under your hips.

1. Reach your right arm under your body, threading it across to the left while lowering your right shoulder and ear to the floor.

2. Keep your left hand planted for support, or extend it forward for a deeper stretch.

3. Hold the stretch for 20–30 seconds, feeling the rotation through your upper back.

4. Return to all fours and repeat on the other side.

This stretch is great for loosening your shoulders, upper back, and spine before your workout.