Skeletons can be remarkably flexible but muscles are needed to move them. Various sports competitors and athletes are seen in action using their muscles. Muscles are used every time we move. There are more than 600 muscles in the human body. Muscles are attached to the bone by tendons and work in pairs to allow for smooth movement. To move a joint, one muscle contracts while the other muscle relaxes and becomes longer.
This clip can be used as a stimulus to highlight the use of muscles when moving. Teachers could use this clip as a reference to explain how the muscles work. Pupils could research an individual muscle and research how they work and aid movement. Children could experiment and show examples of their muscles in action.