18) Supine Frog, click here.
This stretch is likely to be a safer alternative to the Frog. When this stretch becomes "too easy" or if your legs are too strong to be pulled wider by gravity alone, flip over and practice the Frog. Many people add more load to this stretch with the goal of accomplishing greater flexibility (like laying weights on top of their legs). The loading can be done effectively by some, but a smarter alternative is to simply turn over. Adding and removing weights requires you to activate the very muscles you are supposedly trying to stretch. You will get longer muscles more quickly with less risk of injuring them if you learn how to relax more rather than try to always add more weight to force you to relax.
Video coming soon.