Will I be able to attend the Practical with an injury?

Yes, so long as you can instruct other students.

You will need to be able to demonstrate exercises, so having full mobility would be ideal for the practical. However, you will not be required to use heavy weights, so your demonstrations could be done without, or with minimal resistance.

If necessary, you can sit out of the other student's practical demonstrations but we will need to know this prior to you attending so we can plan the session.