Shadow shadow shadow! I'm sure people on here can give you great advice for specific questions, but the only way you can know what is truly for you is to shadow both professions. There are a lot of PTs and MTs out there that love their work and would be glad to have someone come along for a few days. I've found the best way to do this, if you don't have any personal contacts, is just to Google local businesses and either shoot an email or call them. Good luck!