Interlace your thumbs and raise your arms overhead. Engage your shoulders and shrug them up towards your ears. Step forward into a lunge with the knee of the rear leg touching the floor. Stretch your hands up towards the ceiling as you sink into the lunge and push your hips forward as your arms reach back behind you. Stand up out of the lunge and repeat on the other side.
This move stretches and lengthens the arms, shoulders, and back while stretching the hip flexors as well.