A west Cumbrian school teacher on a mission to change his body image and inspire his students has already lost more than three stone.
Jonny Sunter from Great Clifton made the decision to lose weight after coming last in the Whinlatter duathlon in November. His goal is to finish this year's event in the top 75.
So far Mr Sunter has lost three stone and six pounds since December. He started off weighing 22 stone and now weighs 18 stone six pounds.
He also wants to inspire his students at Solway Technology College to exercise and eat better as levels of obesity amongst children nationally rise.
– Jonny Sunter
"Coming last in the duathlon was a turning point. They were packing away and waiting for me when I finished. It was a low point.
"I decided that was the end of fad diets and I wanted to turn my life around and keep the weight off for good.
"I've been working with a nutritionist, physiotherapist and personal trainer to make sure I am doing it sensibly.
"My body image is completely different now. I feel more confident and happier in myself.
"I've also started running clubs at school and every pupil and all of the staff are behind me 100%."
Mr Sunter still has more than a stone to lose before he reaches his target weight and knocked nearly an hour off his duathlon time at the Grizedale duathlon.
Once he reaches his target weight the challenge will be to keep the weight off but he has the added incentive that he is getting married to fellow teacher Jillian Stoddart in April 2015.
Mr Sunter was on the sofa with Pam and Ian and Dr Ajay Bedi to discuss his progress so far.
Photos courtesy of Trail Running Magazine and www.sportsunday.co.uk