15 minutes of sex

Fitness expert has revealed that the best way to lose flab and cut down weight is to have sex.

The world's oldest sport does have its fringe benefits! Fitness expert Lorraine Kelly has revealed that the best way to lose flab and cut down weight is to have sex.

According to a report in 'The Mirror', the curvaceous babe who hosts a breakfast show on GMTV, recently unveiled a slimmer look. And the credit for her well-toned bod goes to her sexual encounter in bed with cameraman husband Steve Smith.

"Fifteen minutes of sex at an active pace is worth 20 in the gym. Life's too short to glower at a lettuce leaf," Lorraine said.

The fitness expert also dumped fad diets and gym workouts for sex.

"The only way to lose weight is the common-sense approach. Eat less rubbish and do more exercise. It's that simple and that hard. Good old-fashioned nookie gets the heart rate up," the 44-year-old mum of one said.