Everyone at that level is, weird with coaches, had more than National Express.
I've been doing a lot of research into injuries in young athletes, mainly for selfish reason as my son is very sporty playing football, futsal and competing in teen Crossfit so keeping an eye on it. A lot of it seems to relate back to a lack of strength and conditioning work at a younger age, not strengthening the tendons and ligaments pre growth spurts, not doing mobility and stability work which comes out when they get older due to over use issues playing one sport repeatedly without building the physical foundations to handle it so when they build strength and power as young adults they are too powerful for their tendons and ligaments to handle. Perhaps explains why so many talented young footballers never kick on and get repeated injuries too.