How Cindy Crawford's knees tell the truth about her age

Cindy Crawford may have the figure and looks of a woman ten years younger.

But today the 45-year-old supermodel displayed signs of her true age as she put her wrinkled knees on show in a short black dress.

The curse drooping knee skins can affect all body shapes and sizes as the ageing process takes hold.

Knobbles on the cobbles: Stunning Cindy Crawford took to the streets of Russia today but the 45-year-old model's wrinkled knee skin revealed her true age

Feeling the strain: Saggy knees can affect people of all body shapes and sizes as the ageing process takes hold

Loose skin around the joint is caused from a loss of elastic fibres, collagen and muscle.

Cindy revealed her knobbles while on the cobbles of Russia today where she was escorted by an enthusiastic group while touring the GUM Department store on Moscow's Red Square.

Of course there are ways to remedy sagging skin around the caps.

Actress Demi Moore is one A-lister who reportedly took extreme measures by having a knee-lift several years ago.

Tell-tale sign: Cindy looked beautiful in her full black outfit as she posed for photographers

Moore, who has denied having had plastic surgery, set tongues wagging after making a head-turning return to the big screen back in 2003 on the Charlie's Angels sequel after a few years out of the spotlight.

However many plastic surgeons advise against the procedure. Knees are one of the hardest areas of the body to have done because there is nowhere to conceal the scarring.

'If you cut away skin there is going to be scarring,' said plastic surgeon Alex Karidis of the Hospital of St John and St Elizabeth in North London in an interview with the Daily Mail.

'If you have a neck lift you can hide the scarring behind the ear, but the knees are one of the most exposed areas of the body.'

Model on tour: Crawford was escorted by an enthusiastic group as she toured the GUM Department store in Moscow's Red Square

He continued: 'I would always advise my clients against having knee surgery because it is impossible to hide. And even though the scarring might not be as bad as the sagging, it will be a tell-tale sign that you have had surgery.'

There are, though, other steps people can take to keep their knees looking more youthful, including moisturising and exfoliating, to boost skin cell revitalisation.

Keeping them well oiled is another beauty tip - so Vaseline or something like shea butter if you prefer for natural ointments.

The website truthinageing.com even recommends wearing a pair of long socks to bed after applying the lubricant to stop the cream rubbing off on your sheets.

Exercise of the right sort can also help. While running on a treadmill like a bat out of hell everyday might exacerbate the problem and put more stress of the joint, leg lifts will help build the muscle above the knee and so keep the area taut and assist in combating saggy skin.