This is perhaps a bit technical for me / my level, but I also feel like it’s something I struggle with, so we’ll file this in the hopefully-I-can-get-to-this-point category.
from Kinetic Revolution
Sciatic Tension vs Hamstring Stretch
The intense feeling or ‘burn’ behind the knee that many runners associate with feeling a hamstring stretch is often actually the feeling of increasing tension on the sciatic nerve as you lean forward… rather than the targeted hamstring muscles themselves.
Instead we should be looking to create a stretching feeling in the muscle belly of each of those hamstring muscles (middle of the posterior thigh), using the hamstring stretch in the video. Try it!
from a Greatist piece