examine the usefulness of a theory for examining the derivation, structure, and effects of your chosen aspect of physical culture.

So say I wanna do cycling as a aspect of physical culture.

What does it mean derivation and structure of cycling?

The structure probably means that you should describe what cycling is in terms of its origin or history, what it is to you, what you need to do it and where its mostly done, and derivation is probably different aspects of cycling, like maybe racing, mountain biking, etc