How to store surfing session data

Hi!

I am developping a device that tracks your surfing, and my goal is for the device to create a FIT file about the surfing session. For a start, this information would be whether I am paddling or not, and the number and time of the waves taken.

Diving into the FIT file format it looks like it might not be super easy to store boolean data (like paddling/not paddling) in Record Messages. Do you have any recommendations on how to do this kind of thing ?

Thanks in advance for your help.