* 110 lb (7 stone 12 pounds): the weight reached by prima ballerina Anastasia Volochkova which led to her firing from the Bolshoi Ballet
* 12 the age at which most girls are considered old enough to go on pointe
* 4350 the number of students at the Cuban National Ballet School in Havana, the biggest ballet school in the world
* 80 per cent: the injury rate among professional dancers in Britain
* 100kg/15 stone: the minimum weight requirement for ballerinas in the Big Ballet, a Russian dance company
* 3 The pain threshold of ballerinas is 3 times higher than that of non-ballerinas
* 7 Ballet dancers are 7 times more likely to suffer from anorexia than non-ballerinas
* 22,000 the annual wage, in pounds, of second year corps de ballet dancers at the Royal Ballet
* 29 average retirement age of professional ballerinas in the 1990s
* 40 average retirement age of professional ballerinas in the 1980s
* 71 the age that Charin Yuthasastrkosol was when she won the Guinness World Record for oldest performing ballerina
P.S. At the bottom of the page, there was a link to another story: "THE SECRET LIVES OF DANCERS," which focuses on Royal Ballet dancers Lauren Cuthbertson, Rupert Pennefather, and Mara Galeazzi.
There is lots of stuff about training, aches and pains, work conditions, etc., rather like you might find in Dance Magazine but a lot more detailed and (to be honest) more penetrating.