The letter – which Sjana shared with her 1.3 million followers on Instagram – urged young people to think of themselves as ‘perfectly imperfect’.
‘Dear girls,
You are not flawed. You are a wild and wonderful existence.
You are a miracle.
You are an artwork of nature; divine and intricate - the epitome of unique beauty,’ she started her poem.
‘You’re rare and raw, a special kind of complex.
You do not need to alter yourself to merge into a mould. Your untamed edges are fringed with all things lovely,’ she went on.
Later in her piece, the fitness star urged: ‘If someone is not able to recognise your worth, this is a reflection of them - not you.
‘Your value is measured in magic and your ability to transform the lives of those around you.
‘Your value is measured by your ability to make other smile and light up any room you enter.
‘Your value is measured in goodness and grace; kindness and compassion. Not the width of your waist or the amount of air between your thighs.’
Sjana who is a trainer on the SWEAT fitness app, alongside wellness superstars Kayla Itsines and Kelsey Wells, has previously been forced to defend her own ‘imperfect body’.
Back in 2015, the Instagram sensation, then 20, took to social media to hit back at shamers.
‘Just because I have a very slender frame does this mean I should shame my own body and others that are also this way?' she wrote at the time.
‘I am so much more than a body - I know that.
'I am not defined by numbers or by other peoples opinions of me.
'And the body I have, as imperfect or "skinny" or "gross" as people may think it is, is my imperfect body and I am happy with it despite their irrelevant opinions.'
Read Sjana’s poem in full on Instagram