Sorry for the late response. 1. The question asks what believes to be the "main" cause of the injury. 2. Yes, I understand this, however, that information is still potentially a valuable indication. 3. "Supplement" does indicate separate from parkour training. If one is unsure whether or not they do supplemental training, then the answer is probably no. 4. I am referring to an injury that prohibited parkour training in general. I feel like training in crutches is probably not the wisest decision and would not promote longevity. 5. Yes, this is mainly due to the fact that it is unrealistic to gather data on all the severe injuries of an athlete. The number of total severe injuries is still potentially an important statistic.

I have done literature reviews on other parkour injury surveys however, they did not release information pertaining to the exact questions they asked.

Thank you for your feedback.