Olympic athlete, Jenny Simpson was injured after the 2008 Olympics as a direct result of repeated stress on her legs and feet from running. The risk of injury for runners is higher for their joints and bottom torso because of the constant impact of forces on their bodies.

Usain Bolt holds the world record for being the fastest man alive. Runners require an incredible amount of strength because the stronger their muscles are the more strength they have to exert and push off the ground as they run.

Dre enters into a karate tournament and is initially scared of the opponent. He overcomes his fear and starts winning his matches using the techniques he learned from Mr. Han. When Dre strikes his opponents.

This catchy song explains what a palindrome is.

A guide to how to watch and understand fencing.