In this time of social distancing and isolation there are many referees looking for ideas to train at or close to home with limited resources such as a gym or specialized equipment. Canada Soccer has produced a referee-centric guide to help with that. It contains ideas and examples of home workouts.
This guide is comprehensive, but straightforward, and intended to be self-help only, with online links to give visual examples of some exercises.
It can be accessed here at the Canada Soccer Nation Inside site here