If we're not careful, the skill of developing well-crafted speed, agility, and change of direction programmes is going to become a lost art.

Martin Stamper, a black belt in Taekwondo, gives a step-by-step video tutorial on how to drill for speed, agility, and co-ordination on the mat.

Athletes rarely run a straight line in their sports. So how do you develop the ability to change direction?

When it comes to field sports, it seems relative strength is more important than big muscles.