'I think people need to chill out': Miley Cyrus' Pilates instructor defends her lean look

PUBLISHED: 20:01, 6 July 2012 | UPDATED: 20:01, 6 July 2012

Over the past few months, it seems Miley Cyrus has taken part in something of a disappearing act as she shows off an increasingly shrinking frame.

But now her Pilates instructor has spoken out to say there is nothing to worry about when it comes to the 19-year-old’s health.

The starlet has been attending Mari Winsor’s Los Angeles classes almost every day and the pair have been working together for four months now.

Happy and healthy: Miley Cyrus' Pilates instructor has claimed there is nothing to worry about in regards to the star's health

Mari told People magazine: ‘I think people need to chill out. She's healthy and she feels good, that's the main thing.’

The fitness guru claims that Miley was never hoping to lose weight and is instead only aiming to tone her petite figure.

She said: ‘She's smart about her body. She wanted to sculpt her body, that's all.’

Defending: Mari Winsor says Miley is aiming to sculpt her body rather than lose weight

As well as attending Mari’s classes regularly, Miley has been following a gluten-free diet to help achieve her lean look.

The sessions of circuit Pilates involve reformer and mat work as well as lots of stretching.

Mari says Miley is determined at her classes and ‘works hard’, adding: ‘When this girl comes in, she is on fire. She's focused.’

And Mari claims the newly engaged star is delighted with the results of all of that hard work.

Dedicated: Miley has been attending the circuit Pilates sessions almost every day

She explained: ‘She loves her abs, of course! She's young and she's got a beautiful body.’

It’s not just exercises to help her achieve a toned physique that the instructor encourages the youngster to get stuck into.

She said: ‘What we focus on with Miley is posture. That was my main concern when she first came to me.

‘I wanted to get her shoulders down and get her to relax her upper body. If you notice, her posture is a lot better.’

Paying off: The star, who is engaged to Liam Hemsworth, apparently loves her abs

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