Here is a series of leg stretches which Dr. Bacon recommends as part of your overall fulcrum workout. These should be performed at the end of your fulcrum program.
Fulcrum Hamstring Stretch
Fulcrum Hamstring Stretch (easier version)
(this one is essentially the same as the hamstring stretch above, so you can do one or the other, but don't have to do both)
Additional Leg Stretches