The one thing to remember, Goddard says, is that you might struggle to make Zander's practice-tee fix if you can't stop your body from drifting. With that in mind, here he demonstrates three exercises ...

The hip flexors are a group of muscles that pull the thigh toward the torso, with the main one being the iliopsoas. It connects the lower spine to the femur and is crucial for sprinting and leg drive.