The Low Lunge Arch

Step your right foot forward into a lunge and lower your left knee onto the floor or a folded towel or blanket.

(A) Bring your arms in front of your right leg and hook your thumbs together, palms facing the floor.

(B) Breathe in as you sweep your arms overhead, stretching as far back as is comfortable. Take five deep breaths. Switch sides.

From realsimple.com