Im a biomechanics specialist pod, working for the NHS.
I enjoy my work (mainly), and the variation in specialisms within what is already a pretty specialist field are significant.
Jobs are limited in the nhs (small departments, often with low turnover of staff) – but often more time is spent with higher risk patients, and greater speciality. Private and self employed is rapidly increasing. Most focus on the general care aspects rather than the more specialist biomechanics and woundcare.
My advice would be to spend time shadowing, several sessions – preferably NHS and private would be the best way to get a feel for the profession and whether it is something you would enjoy.
(Contact local NHS department and they could well help with shadowing if you discuss it with them.)