I have a good friend who is a masseuse, and she told me that one of the most demanding parts of massage education is how to do body massages for the elderly.
You not only have to understand neuromuscular therapy, but also how to tailor different touch therapies for elderly patients.
For example, you can almost never do a deep tissue massage on an elderly person; they're just generally too fragile.
However, you can take some of the concepts of deep tissue massage and tweak it to give those same benefits to an elderly person without the intensity of the massage.
All in all, very demanding.