The two shapes could not be more different, but both are ideal for the sports in which these two women compete and excel.

I can think of few sights more beautiful than Serena Williams' dominance on the tennis court. She moves with such power and assurance. Her body is as strong as any woman's body can be. Serena is pure athletic perfection. Even if I hated tennis, I would watch to study Serena in her tight-fitting cat suits and other daring outfits.

I am awestruck by the power in tiny Shalane Flanagan's body. She looks

Booty queen on Wimbledon: Serena Williams

I am saddened by the fact that Dutch swimming star and world champion Inge de Bruijn has retired. She was magnificent in the water, beating opponents with superior technique and strength, as well as being a master of mind 

Behind the scenes: Swedish swimming star Therese Alshammer 

Speaking of the Olympics, I can't keep my eyes of women sprinters in the 100 and 200 meters. If ever you want to see perfect legs and butts, watch those sprint stars prowling round their blocks as they prepare to race.

Swimmer Inge de Bruijn

With my love of sports and female athletes, I had to marry a track star. My wife is one of the best half marathon runners in her age group in Louisiana, Texas, Arkansas, and Oklahoma. If you have ever competed in a 10k, half marathon, or marathon in those states, chances are my wife will have raced past you, no matter whether you're a man or woman.

  Inge de Bruijn, said to have the perfect body

Former sprint ace Inger Miller

Queen of the track, Merlene Ottey. Fastest woman over 45

Kara Goucher, world class American distance runner

She runs an average of 70 miles a week, spread over six days with the seventh day as a rest day or devoted to cross training. 

She's in the gym doing circuit training and weights three times a week. Running takes care of your legs, but you need gym work and weights to strengthen your body core and tone your upper body.

Not enough amateur runners work on their upper bodies. They have superb, strong legs but are flabby from the waist up. If you want to be really good at long distance running, you have to train your entire body.

I, as an athlete's husband, get plenty of benefits. Not only do I have a training partner who can really push me on long runs, I have a focused and dedicated life partner.

Perhaps it's the serotonin boost that runners get, or perhaps it's the strict structure of training that builds focus and commitment, but I have never met anyone as good as my wife at defining life goals and meeting them. She defines big, long term goals, and along the way she has smaller goals which measure her progress. She trains incredibly wisely, always knowing when to ease off to avoid injury or over-training.