I have always maintained a high level of fitness and that is why I am still able to handle the demands of playing in the Premiership. People have always commented on my fitness and it's something I pride myself on.

Fitness will be a major factor in the first race and I think that will play into the hands of drivers who have been racing recently rather than people like me who haven't raced properly for a decade. I'am not one of the favourites to start with.

There are similarities between business and sport in the pressures involved and in the fitness aspect too.

For a good workout I go to At One Fitness in North Hollywood where my trainer Jon Allsop puts me through it all. I like it because it's a small gym and I've known the people for a long time. Jon will have me do cross-training where I'll lift weights jump rope throw around a medicine ball and I never get to stop.

Guided only by their feeling for symmetry simplicity and generality and an indefinable sense of the fitness of things creative mathematicians now as in the past are inspired by the art of mathematics rather than by any prospect of ultimate usefulness.

I've published one book before and now I'm writing a book of essays and stories about life in Tokyo. And I have one book coming out in May in Germany about fitness.

For years I always thought it was hilarious that I was this fitness guru because fitness was just a tool I utilized to help people improve their confidence. For me it's never been about fitness. It's always been about helping to empower people.

I'm healthy now. I probably wouldn't say I'm at my best fitness level and I haven't played that much lately but I'm healthy and that's all that matters.

I've had one very bad ankle injury but otherwise I've been incredibly lucky with my fitness. I've worked hard at it and I've always been fit even compared to other players. That sustains you through various parts of your career but I am 36.

We are involved in youth testing internationally. We want to try to prove without a shadow of a doubt the relationship between physical fitness and health not just physical fitness and ability to perform.