flexibility in straddle L

I don't have enough active flexibility to be able to do the straddle L as in the picture:

http://www.drillsandskills.com/images/a ... dwn3sm.jpg

What exercises do you recommend to increase flexibility in order hold that position?

Focus on training your straddle L low and add the assistance exercise at the bottom of this page. That's what I did.

http://www.drillsandskills.com/article/16