Different types of hamstring stretching

In yoga, we often stretch statically, holding a pose as such as hanumanasana (splits) or holding a forward bend. However we can also stretch dynamically, moving in and out of a pose repeatedly and exploring a complete range of joint motion. Research shows that both of these methods are effective at increasing range of motion, but Proprioceptive neuromuscular facilitation (PNF) stretches may lead to greater and faster progress. PNF is a technique in which muscles are intentionally contracted, then intentionally relaxed. The exact method by which PNF works is unclear. It may be due to an increase in tolerance, or because of an underlying neurological effect. (Interestingly, even the opposite limb to the one being stretched appears to benefit from PNF techniques, which suggests that there is a neurological component to the release.) Other research hints that PNF techniques may decrease the reflex that usually inhibits a deeper stretch.

In my practice and my teaching I like to incorporate all of these type of stretches. Static, dynamic and also adding in PNF techniques. I personally have found a greater range of motion since incorporating these into my practice.