Get Rihanna"s body in just 25 minutes! The workout secrets behind singer"s hot body (clue: it includes 3 fitness gadget)

Get Rihanna's body in just 25 minutes! The workout secrets behind singer's hot body (involving a fitness gadget that's just 3)

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UPDATED:

16:37 GMT, 8 May 2012

Achieving an A List body doesn't mean you have to have the bank balance of one, according to a personal trainer to the stars.

Harley Pasternak says he keeps celebs like Rihanna and Megan Fox in shape by getting them to wear a pedometer, which can be bought for as little as 3.

'I tell her (Rihanna) to make sure she takes 10,000 steps a day,' the fitness expert told Grazia magazine.

In shape: Rihanna showed off her slim figure at this week's Met Gala... and got in a few of her 10,000 steps a day on the red carpet

In shape: Rihanna showed off her slim figure at this week's Met Gala... and got in a few of her 10,000 steps a day on the red carpet

In shape: Rihanna showed off her slim figure at this week's Met Gala… and got in a few of her 10,000 steps a day walking the red carpet

As well as walking, Harley gets the singer to do a workout five days a week that takes just 25 minutes and can be done anytime, anywhere.

'I've put her on a special 25-minute-day workout that consists of five mini workouts,' he explains. 'She does it five days a week, wherever she is in the world… it's easy for her to fit around her busy schedule and even her holidays.'

The workout involves five phases – the first and last are a cardio warm up/down of jogging or skipping, while the middle section involves repetitions for the upper body, lower body and abs (for more information see box below).

Results: Rihanna has been asked to model Armani underwear and this shot shows how her workouts have paid off for her figure

Results: Rihanna has been asked to model Armani underwear and this shot shows how her workouts have paid off for her figure

THE 25-MINUTE WORKOUT
Five minute cardio warm-up eg joggingFive minute upper body workout eg push upsFive minute lower body workout eg squatsFive minute ab workout eg sit upsFive minute cardio cool-down eg skipping

The exercise regime has clearly been
paying off as Rihanna has been showing off her toned figure while on
holiday in Hawaii recently and hasn't been shy of tweeting pictures of herself in a two-piece.

But the results aren't just achieved through exercise alone.

Harley also gets Rihanna to follow his 'five-factor' diet plan, which he details on his website www.5factor.com.

Instead of the traditional three meals a day, his diet recommends eating small five meals. Each of these meals must contain five key ingredients – protein, fibre, 'healthy' carbs, (eg fruit and vegetables) a 'healthy' fat (eg avocado or nuts), and a sugar-free drink such as green tea or vitamin water.

One perk of the eating plan is that dieters can have a 'cheat day' once a week, when they are allowed to eat treats like chocolate. Harley says this helps his clients like Rihanna keep their diet on track.

'If you're good all the time, you're more likely to slip up and feel bad about your self. If you allow yourself to have a day where to eat anything you like, you'll stay on track the other six days. That's the secret to a great body and it keeps Rihanna happy,' he revealed.