Victoria Beckham dedicated to health and fitness

Victoria Beckham runs the extra mile to keep up her appearances. Photo / Supplied

Victoria Beckham's slim figure is a result of hard work "six days a week".

The singer-turned-fashion-designer is famed for her petite frame and ever-immaculate appearance. Sources close to the star say although she can afford the best treatments around, Beckham is also very dedicated to her health and fitness routine.

"She works out six days a week and runs four to six miles a day on the treadmill. But she worries about getting 'runners face', where muscles sag, so she does facial exercises to tone up. She also uses weights and exercises her core, as she feels her stomach is her problem area," an insider told Closer magazine.

"She's trying to shape up her 'flat, saggy bum' too after obsessing over photos taken of her before Christmas, so she does butt clenches, squats and Pilates every morning."

Beckham is also reportedly very particular about her beauty routine. The 37-year-old star likes to use specific products to keep her looking in tip-top shape.

"She never goes out without sunscreen and always tries to wear sunglasses, as she thinks squinting causes crows' feet," the source added.

"She sleeps on a silk pillow to prevent wrinkles and has twice-weekly skin treatments and a facial at least once a week.

"She also has collagen masks, laser resurfacing and pore-tightening treatments."

Beckham also has a fastidious diet. The brunette beauty likes to control her meal plans so that they're always healthy.

"She doesn't do carbs and believes white flour, rice and bread are the enemy. Her daily diet includes blueberries, acai berries, green veg, fish - all the 'superfoods'," the source added.

"Occasionally, she does have brown rice, but in small portions. Her menu is very controlled!"

- AAP