Not sure quite what you're getting at, but here's a few observations:
Massage Therapist does not exist as an occupation in the CF, Reg or Reserve.
A person older than 55 can apply to join. That being said, there is a requirement that they complete their basic engagement, so 57 is considered the top age.
If a person is sufficiently fit and eager, I see no reason why they should be dissuaded from applying. Bearing in mind of course that everyone gets to apply, not everyone gets to join.