An Olympic style competition with a variety of events such as 50yd dash, Basketball shooting accuracy, Bicycle Race, long jump, pushups/situps per minute, pullups, 3 mile run. All tests are done by honesty/ posting of video evidence.
you have several months to train and prepare... all contests equally rated over say, 10 categories.
Sort of like fantasy olympics... however, you are competing. yea, maybe there should be a prize for top winners. How to keep it honest is a challenge...