You increase muscle bulk by training against resistance. For example, weights. And in ballet, this isn't the case.

As you get older, the physical abilities decrease, which is particularly frustrating because your brain gets so good! So as you are becoming less technically or physically able, younger dancers are emerging who need the space to perform.

I get to the theatre in plenty of time; I prepare my shoes in advance; I eat and drink the right things at the right time. The rest you have to leave to luck!

So if the dance is five minutes long, make yourself run for perhaps eight minutes. That way, you over-train and the dance will seem easier.

Dancing is a tough career, but I'm glad I spent it at the Royal Ballet.

I've always believed that the facts about dancing are more interesting than the myths, and this was a great chance for me to explore how the human body does such incredible things.

It's not about weight, it's about fitness, and one component of being fit is to have relatively low body fat, because fat is not very efficient, whereas muscle is.