Self Injury in Dance
There is quite a bit of research on injury and burn out among elite athetes, but less about dancers. however, some of the same points can be applied to your study. These articles all make recommendations about how to limit injury and burnout which may be transferable to a dance context - how many of them would be applicable to teenagers embarking on a ballet career? How many of them would be acted upon by ballet teacher and students?!
Overuse, Overtraining and Burnout in Adolescent Athletes [http://pediatrics.aappublications.org/content/119/6/1242.full]
New Research show increase in dance injuries - examines the latest Dance Safe statistics (2017)
Dance Australia has a good overview of issues around stretching
Posh words to use:
etiologic factor (cause of something)
Pointe
when is a prepointe assessment useful for your student includes x-rays demonstrating key probkems with starting pointe work too soon