I’ve heard stories (unverified) that hedge funds manipulated political betting markets ahead of Brexit. Whatever loses you made betting would be more than offset by even a tiny shift in govt bonds or whatever.
If something like this happened, and the inherent correction mechanisms of a market were insufficient, I would probably just focus on the forecasts of top users.
Re injury prevention, you may be interested in Stuart McGill, professor of ‘spinal biomechanics’ at Waterloo.
For example, you shouldn’t exercise first thing in the morning. Something about your discs being more hydrated --> swollen --> vulnerable after laying overnight.
Very open questions, but curious if you have any thoughts on Olympic lifting vs powerlifting. Or on kettlebells and hip-hinge exercises.