I understand that greenside navy corpsman are usually igned with a Marines unit, but is there an age limit?

I'd like to join the Navy Reserves and enlist as a Corpsman, however I am 36 years old (on the navyreserves.com site it said max age is 39). If my reserves unit is attached with a combat unit, will I be too old and inexperienced to be deployed with them? Are there higher physical training requirements?