SPA AND MASSAGE
You can get massages everywhere on Koh Phangang and Thong Nai Pan. And the good of it is, it's very cheap compared to prices in Europe, so you can really pamper yourself. Ranging from beach massage to a full spa package at a number of 5-star hotels. You don't have to be a guest at most of the resorts, to get a treatment. It is advisable to book an appointment in advance during high season.
Many people exercise regularly in everyday life, and you can still keep the training regime in line even if you are on vacation. There are in fact several gyms on the island.