A BOY who was once dubbed the world's strongest kid looks unrecognisable 13 years later.
Liam Hoekstra, from Michigan, gained the name the “mini hulk” at age three when his insane muscles sparked a media and medical frenzy.
Back in 2014 he starred in a documentary called The World’s Strongest Toddler where doctors called him a “medical mystery”.
It followed the toddler as experts attempted to figure out the secrets of his super strength.
Footage shows young Liam with the abs and biceps of a body builder at the age of three.
The tot began walking at just five months old - and by six months could climb up and down stairs.
By the time he reached one, he was able to do chin-ups - and at 18 months he was able to pick up and move around furniture.
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Finally doctors learnt that Liam had an extremely rare genetic condition called Myosatin gene mutation, and only one other similar case has been documented in the world.
It caused him to have 40 per cent more muscle mass than the average child, meaning he had very little body fat.
Now, Liam is unrecognisable at age 16 and seems to be living the life of a normal teenager.
He has honed in on his super strength to play ice hockey and is a keen fisher.
It comes after another teen who had also been given the title - world's strongest kid - this week revealed how different he looks 13 years later.
Giuliano Stroe, from Romania, became a global sensation after he was entered into the Guinness World Records at the age of five.
In the picture shared to Facebook, Giuliano, now 17, is all grown up holding a picture of himself when he set his first record in 2009 when he was just five years old.
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Wearing a weighted ball on his legs, the youngster set a new record for the fastest 33-foot hand-walk.
The little bodybuilder performed the stunt in front of a live audience on Italian television.
Astonishingly a year later, he set the world record for the most 90-degree push-ups.