For his thesis, Sander Piron is doing research about injuries that occur among Ultimate players. According to him a lot of players are under treatment for injuries but there is a lot unknown about the frequency of the different injuries. Therefore he opened a online survey to gain more insight into this topic. If you want to help him out, you can fill in his online survey you can find here https://www.surveymonkey.com/s/ultimatefrisbeevragenlijst.
It takes about 4-8 minutes to fill in the survey and it is completely anonymous. You can fill in the survey until April 29.