The skeleton, heart, lungs, and muscles are the focus of this unit. Students will create a cardboard arm with "muscles", look at muscle cells under a microscope, test lungs for endurance, and learn flexibility exercises. There is a Jeopardy-type quiz game for the class to play, and students will plan a high-carbohydrate meal for quick energy. The content is appropriate for athletes and others who wish to remain physically fit.

The accompanying video for early teens contains three parts:

- Pre-game Meal

- Keeping Fluid Levels Up

- Keeping Energy Levels Up