With the amount of time you'll be spending on the beach its understandable that you might want to hit the gym while you're here. A little extra around the middle might be nice when the mercury drops but 'spare tires' have no place on the beach. While there are plenty of outdoor activities around the island to help keep you fit and firm (swimming, Scuba diving, Muay Thai) for many people there's no substitute for a good gym.
The best gyms and fitness centres in Phuket can be found at the major resorts and spas. These facilities will have the most modern and well maintained equipment, as well as all the ancillary services (juice bars, saunas, locker rooms) that take the pain out of the gain. Check with your hotel to find out what kind of health and fitness centre they have on offer.
Of course there are plenty of specialized gyms and fitness centres all over the island to keep you looking and feeling your best, even while you're on vacation. Most gyms have monthly, weekly and daily rates and joining is rarely a hassle, just bring your passport.