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Published 21:54 2 Aug 2017 BST
Updated 22:07 2 Aug 2017 BST

Do you train your calves?!
Kellie then spoke about how the lower back is overlooked time and time again because when we talk about exercising the back, people think that working the upper back is enough.
Even diligent gym goers can fall foul to this and Kellie says that strengthening your lower back can reduce the risk of injury.
"The erector spinae, i.e. the lower back, is overlooked way too much, which is ironic because it’s the same area where the average person complains of pain.
"Not only does it look amazing when it’s developed, but it also protects you from injury" recommended the fitness professional.Explore more on these topics: