In a sweltering training camp on a tropical Thai island, sweaty tourists wearing oversized gloves and baggy shorts slam their fists, knees, elbows and feet into a row of heavy bags.
Students work out at the Tiger Muay Thai & MMA training camp in Phuket, southern Thailand, on February 15, 2013. With worries growing about the world's bulging waistlines, many foreigners are flocking to Thailand to spend their holidays not on the beach, but following a punishing regime of training in Muay Thai and other martial arts.
Welcome to the latest craze in extreme fitness -- Muay Thai boxing.
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