Many of us find the thought of running a marathon a daunting prospect. Spare a thought for Ben Smith who is running not one, but 401 marathons in 401 days.
He's travelled the length and breadth of the country. Today, as he did his 247th marathon, he stopped in at nineteen schools in Grantham along the way.
If Ben Smith completes his challenge, he will have run more consecutive marathons than anyone else in the world. He wants to raise money and awareness of bullying - a subject he's all too familiar with.
I myself was quite badly bullied at school because of my sexuality and I don't want that to happen to other kids.
So far Ben's raised more than a hundred thousand pounds for charity, and with a hundred and fifty-four marathons left to do, he's hoping to get that figure to a quarter of a million.The money will then be split between the charities Stonewall and Kidscape.
Ben has to eat around six and a half thousand calories a day to complete his 26 miles. Ben has a positive message for anyone who hears his story.
I'm passionate about running. It's what gives me confidence and builds my self esteem, you know the freedom and adventure I get from it keeps me driven, but you know that could be anything, for anybody, be it chess or ping pong, basketball - whatever you want. You've just got to find something that keeps you happy and that'll keep you going.
One day, Ben wants to begin a foundation that supports anti-bullying projects across the country.
You can watch a full video report on Ben's challenge below: