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.

It's another myth that dancing distorts or destroys your feet. If you have the right shaped foot to start and a good, strong technique, your feet should be fine.

At the moment I'm enjoying a new challenge at the Royal Opera House, but I'm also keen to pursue my interest in television and particularly in science.

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.

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.

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

You can't reduce lactic acid, but you can increase your tolerance to it. I do this through running or cycling, but it's a good idea to match your training bout to the type of dance you do.