If he wants to improve his life - or even have a life - only he can achieve it through a rigorous diet and exercise regime.

When you look at it like that, the prospect of a blast of rigorous diet and exercise seems positively attractive.

Jockeys have always had to follow a rigorous diet, but now recreational riders are also being urged to watch their weight.

In 1950, he began a rigorous diet with regular exercise to accent his physique.

I have no doubt that, whatever their claim, most models, like ballerinas and jockeys, put themselves on rigorous diets.