The prime minister's wife Samantha Cameron has been spotted jogging with a personal trainer in her green and black ladies running clothing.

Mrs Cameron has enlisted the help of exercise expert Matt Roberts, who also aids the Saturdays, Naomi Campbell and Amanda Holden in staying in shape.

The 39-year-old wore black leggings, white trainers and a green fleece top during her workout.

She looked very svelte and toned as she pounded the pavement in London, despite the fact that she gave birth to her fourth child less than seven months ago.

According to the Daily Mail, Mr Roberts helped David Cameron to get back in shape last summer, free of charge.

Last year, model Kelly Brooke told Women's Fitness magazine that she does not have a personal trainer, but likes to attend fitness classes instead.

The 30-year-old said her favourite forms of exercise are swimming, yoga and dancing - especially salsa.

Posted by Tina Wilson ADNFCR-2569-ID-800457391-ADNFCR

Sport & Fitness Clothing News - Latest Stories

Danger of exercise to hypertensive people 'blocked'

Posted on 06-Apr-11

Scientists have found a way of preventing a greater increase in the blood pressure of women with hypertension when they exercise in their ladies running clothing.

Sport for all initiative hailed a success

Posted on 06-Apr-11

People of all ages, abilities and walks of life donned their gym clothing recently to take part in free sports sessions at the University of Nottingham.

Exercise 'keeps the heart young'

Posted on 05-Apr-11

Women who exercise regularly throughout their lives have stronger, healthier hearts than those who do not don their ladies fitness clothing often, a study has suggested.

Using own body mass 'is helpful in resistance exercise'

Posted on 04-Apr-11

Older women can benefit from donning their gym clothing and taking part in resistance exercises that include using their own body weight.

Progressive resistance training 'is good for seniors'

Posted on 01-Apr-11

Progressive resistance training can help elderly women to improve their strength in their ladies fitness clothing.