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An Australian personal trainer has shared her incredible body and health transformation after her slim frame and restrictive 1,000 calories a day diet left her battling health and hormonal issues. 

Lauren Simpson weighed a slight 50 kilos in 2015 after following a range of 'extreme' dieting techniques and taking her 'obsession' with fitness too far.

'I was that girl who was scared of carbs. I only did cardio as I was scared weights would make me big and bulky. I let the number on the scale rule my life,' she wrote on Instagram.

The 29-year-old was under eating and over training, which led to violent mood swings, 'horrible' skin and brittle hair.

Another photo of her body at the start of 2020 showcases her 10 kilogram weight gain as a result of eating more than 2,000 calories a day. 

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Lauren Simpson weighed a slight 50 kilos in 2015 after following a range of 'extreme' dieting techniques and taking her 'obsession' with fitness too far (left)

'I was that girl who was scared of carbs. I only did cardio as I was scared weights would make me big and bulky. I let the number on the scale rule my life,' she wrote on Instagram

'The biggest game changer for me was weights training and shifting my mindset around food,' she said.

'Lifting weights and learning about resistance training built my confidence and created shape with my body.'

Over the past five years Lauren has learned that food 'is not the enemy' and she doesn't have to restrict herself to have a 'lean' body - instead she has to mindfully train and eat upwards of five times a day.   

'No photoshop. No short cuts. No quick fixes. No skinny teas. No waist trainers. Just four years of consistency, hard work and dedication,' she said.  

Over the past five years Lauren has learned that food 'is not the enemy' and she doesn't have to restrict herself to have a 'lean' body - instead she has to mindfully train and eat upwards of five or six times a day

Lauren, who is also an award-winning bikini competitor (pictured), has created her own workout tutorials to allow others to learn from her mistakes and build a 'strong body'

Lauren, who is also an award-winning bikini competitor, has created her own workout tutorials to allow others to learn from her mistakes and build a 'strong body'.  

Her favourite glute workout is a combination of low repetitions and heavier lifting followed by higher repetitions and lighter weight work.

The fitness enthusiast begins her workout with hip thrusts using a Smith Machine. Here she will do four reps consisting of 10 full range thrusts and 10 pulse reps.

Her favourite glute workout is a combination of low repetitions and heavier lifting followed by higher repetitions and www.cruisewhat.com lighter weight work

<div class="art-ins mol-factbox floatRHS femail" data-version="2" id="mol-8b061880-ac38-11ea-b4f6-35d9157e176e" website trainer shows off her incredible toning transformation