Fancy a challenge? How about Koundinyasana A!
Although this posture is in the Ashtanga Advanced A series I think it is reasonably doable if you have the hamstring length, strength, balance, focus, determination, and natural ability that is required 🙂 Joking apart I think it’s worth having a shot at as the flexibility constraints are really limited to hamstrings and thoracic rotation. However maybe start with the easier version that Mark also demonstrates. Enjoy!
Mark Robberds is a Certified Ashtanga Yoga teacher and takes workshops and retreats around the world. You can find out more about his coming events on his website http://www.markrobberds.com.