Sprinter Throws are a great front leg stabilization exercise.
The athlete starts in a forward lunge, with all of their weight on the front foot. The front shin should be at a 90 degree angle, and the spine at a 45 degree angle.
The initial movement is to pivot on the back foot from the toes into a grounded foot which is now parallel to the target.
Next, we transfer our weight into the back leg and drive ourselves forward to deliver the ball. Think about staying strong on the front leg and cementing that foot into the ground as you land, not allowing it to spin.
We want our front leg to be the foundation and the pillar around which all our mechanics revolve.