I do find this funny, oni can't win with some people here
We seriously have people here telling him not to train hard because he might get injured. Obviously you don't want to get injured but if you never get injured in your chosen sport you are either extremely lucky or much more likely, not trying very hard.
If you want to get good at any sport there is always the strong chance of injury when pushing your body to its limits, that's the risk you have to take. If you don't ever want to get injured maybe take up knitting.