A new mum who once tipped the scales at 18 stone is feeling in a league of her own after losing eight stone to become a world championship bodybuilder . Jenny Clark , from Bournemouth , Dorset , ballooned to a size 18 when she was pregnant with her son Mason and once he was born , decided to join a gym to lose the weight . When a gym instructor told Jenny , 36 , that she looked very symmetrical and should consider bodybuilding , she tried pumping iron as a way to shift the baby-weight and found she was a natural at it . Mother 's love : Four-year-old Mason is Jenny Clark 's biggest fan and enjoys watching her compete . Flashback : Jenny before she lost the weight ( left ) and displaying her winning ways . In just 18 months , the new mother lost five stone in fat and built up her impressive muscles with gruelling weight and cardio sessions . Although she came last in the first weight-lifting competition she entered , Jenny did n't give up and after a few more disappointments she started winning . She qualified her for the International Bodybuilding and Fitness Association ( IBFA ) British Championships last year which she won and has now gone on to win the World Championships . Now Jenny weighs 10st 9lb and her body fat is down to just nine per cent . And her son Mason , now aged four , has become her biggest fan and loves going to 'mummy 's muscle shows ' . Jenny shows off her bodybuilding prowess competing in the IBFA World Championships in Rome . Jenny piled on the pounds during pregnancy but began losing teh weight once she joined the gym . Jenny spends three hours a day training in the gym and is aiming to compete in the Miss Universe competition in Italy this summer . The mother-of-one said : ' I ate for three the whole time I was pregnant and I put on a lot of weight . ' I really struggled to lose the weight afterwards for about three years and I was really unhappy . 'Through exercise and diet I 'd managed to lose a bit of weight . I was doing a gym class and I was the only one who turned up . 'My gym instructor must have been watching me more closely because it was just me and she said I was really symmetrical and had I ever tried bodybuilding . ' Weigh to go : Mason tries lifting the weights for himself while mum Jenny trains . Young Mason loves nothing more than seeing his mother in action . Jenny , who is a tattoo artist , said her husband , Dominic , used to be a bodybuilder and encouraged her to give it a go . She said : 'We went along to a show and I decided I wanted to do it . 'In my first competition I came last out of five people in my category and I was absolutely mortified . ' I 'd put in so much work and I was just gutted but I signed up for another competition two weeks later and came fourth out of five . Jenny 's husband Dominic takes a closer look at his wife 's bodybuilding trophy . In safe hands : Using to lifting heavy weights , Mason is as light as a feather by comparison . 'Doing that first competition I never imagined I would now be world champion . ' I like the way I look on stage . You have to learn how to pose properly so it shows your physique off to its best . 'Even when I 'm not at competitions I still get a lot of positive comments about the way I look . ' I 'm not as lean as I am during competitions , but I still have quite a bit of muscle definition . 'At the beach it 's usually guys that comment , saying things like `` check out how big her muscles are '' , I think they 're probably jealous ! ' I do n't take anything to heart because everyone has different ideas of what 's attractive . '
Binge-eating during pregnancy say the new mum tip scales at 18 stone . Joined gym to tone up and instructor suggested she try competing . Setting sights on Miss Universe contest in Rome this summer . Four-year-old son Mason is her biggest fan and enjoys shows .