Scientist Nina and her young experimenters investigate the human body and find out why it is brilliant.
Nina investigates why exercise is good for you with the help of her sense neurons. Experimenters Catriona and Luke visit Nina in her lab and discover that anything that makes people move their bodies can be exercise. And exercise is good because it keeps bodies fit and healthy.
Next, they go to see some young people play wheelchair basketball. They are invited to join in and find out that this is a really fun type of exercise that makes their arms really strong! Finally, back in the lab, they have more fun pedalling special exercise bikes and discover that exercise is good for minds as well as bodies. Nina explains that exercise releases things called endorphins in our brain that make people feel happy.