The 24-year-old star put herself through a week at the No 1 Bootcamp in Norfolk in a bid to shape up ahead of the summer.
But the exercises were anything but easy, as Maria crawled through the muddy ground on her elbows and did push ups on the beach.
However, the busty redhead didn't seem too worried about getting down and dirty on the regime, giggling and laughing as she looked down at her mud-stained pink vest top and black leggings.
Getting down and dirty: The Only Way Is Essex star Maria Fowler gets a little muddy as she takes on the intense workouts at No. 1 Bootcamp in Norfolk
Working through the pain: Maria kept followers updated with how it was going on Twitter, and said at the beginning of the week she had already lost 3lbs
After completing the camp, though, Maria was keen to get back to her pampering, tweeting fans: 'Need a serious pamper after all this.. Nails, tan, eyebrows! And toned hopefully!x'
And the reality TV star was clearly thrilled with the result of the intensive workout plan, telling her followers she intends to have a week's break before returning to the bootcamp in a week's time.
She tweeted: 'Jus looked in bigger mirror before shower n my body DEFO looks loads better and more toned.Im definatly gona do my best to come bk in a week.
Give me 10 more: Maria is motivated by a No. 1 Bootcamp instructor as she struggles to finish her push-ups
I'm covered! Maria looks down to see how much mud she has been covered in during the workout
'So @no1bootcamp tried, tested and thumbs up from me, as I don't ever excercise so shows what a week intense exercise and healthy eating can do!! X'
While it is unclear exactly how much weight Maria managed to lose during the week, she tweeted after just a couple of days there that she had shed three pounds.
Maria isn't the only celebrity to go to the No. 1 Bootcamp to tone up.
Is it over yet? Maria appears to be struggling with her push-ups on the muddy beach
It's gone in my eye! Maria discovers that the mud can get absolutely everywhere as she crawls along on her elbows
Chantelle Houghton, Jennifer Ellison, Sophie Anderton and fellow TOWIE girls Lydia Bright and Lucy Mecklenburgh have all discovered the benefits of the course.
After going to boot camp, Chantelle, who released her own boot camp fitness DVD, said: 'Putting on a bikini can be quite daunting, but I feel completely different now.
'My body’s not perfect but I’m so much more confident. It’s fantastic to be able to buy a dress that I like rather than one that hides my stomach.'
Making a dash for it: Maria completes her run as the workout nears an end
Nearly there: Maria's instructor keeps a close eye on the time as Maria finishes the exercises
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