First of all, you must think about what you and the other members will achieve and virtually show me the fitness challenge. Understanding what your members want is also crucial, and then you have to decide whether it will be free or paid. Content is the key, as your members should be clear about what you want them to do. You can use Facebook live or Instagram TV to stream live content and explain the format of your virtual fitness challenge. Lastly, it would be best to encourage them to share their fitness journey to motivate other members.