Put all of your weight into your standing leg and step backward with your other foot into a lunge position. Your front knee should be in line with your big toe. You can lead with either foot.
Let your back knee drop down to the floor and untuck your toes.
Pull your arms back into a cactus shape with your fingers spread out and flared.
Reach your arms up.
Repeat this reaching motion for 30 seconds, then switch sides.