The price of gold and fame

Olympic athletes appear the peak of physical form, youthful, muscled and lean, but many push themselves to play through pain, undergo multiple operations, and often end up with the knees or hips of people twice their age. And for younger athletes, who tend to be disproportionately female, there are yet more health issues related to intense training before bodies are fully developed.

For younger competitors, the American Academy of Pediatrics' guidance on sport suggests that it is unhealthy for children under the age of 12 or 13 to specialise in any one activity.
Yet most young athletes, notably gymnasts, whose balance and flexibility is affected as their bodies develop, are training intensively by eight or 10.
Low body fat can mean late puberty for girls, which in turn can lead to lower bone density and risks like stress fractures and osteoporosis.
"You see people of 16 or 17 years old with the bones of a 60 or 70-year-old," said Jordan Metzl, a physician and co-founder of the Sports Medicine Institute for Young Athletes at the Hospital for Special Surgery in New York.

There is little promotion of sport for ordinary people at the Olympics, no halfway ground between athletes driving their bodies to their limits and spectators chomping fast food in the stands while they watch. Some suggest that athletes are also more susceptible to eating disorders, whether in "aesthetic sports" like gymnastics or diving, or those like wrestling, where diuretics are common.

Some personalities, driven by the hope of one last triumph, are also less likely to stop when they should as the financial rewards of success ratchet up.
After the 2004 Games in Athens, veteran Russian diver Dmitry Sautin said it was likely his last Olympics.
"My body has suffered a lot of scars, lots of operations. My health isn't what it used to be," he said. But the 34-year-old was back in Beijing, where he finished fourth in the three-metre springboard final.