Runner's Stretch
The runner's stretch is an active mobility drill for the hips and hamstrings. Several variations increase intensity and work towards the front split with a main focus on the hamstring of the front leg.
Static:
Keep the back leg vertical and sit tall to being
Hinge forward generating anterior pelvic tilt at the hip to your furthest range, then fold forward
Keep tension in the front leg by squeezing the quad and flexing the toes back towards the face
Equally hold your body up with your hands as well as your front leg to build strength in the stretched tissues
If you can't reach the ground with anterior tilt then use risers for your hands to assist
Slides:
Start in the runner's stretch position and slide forward using your leg strength to control the movement both directions
Focus to push and pull through the hips and maintain powerful tension in the quad and flexed foot
Work carefully and do not overreach. It is easy to do too much.
Use risers under hands as needed to assist the position