The celebrity chef, who is best known as one of the judges on Australian reality television series My Kitchen Rules, said that he has hired a personal trainer to help him lose the 10kg (22lb) that he has put on while filming the cooking show.
Feildel told The Daily Telegraph: "I'm a bit of a yo-yo. I put on weight on My Kitchen Rules last year, but then I did Dancing with the Stars and lost a lot of weight.
"I did My Kitchen Rules this year and put on weight, and now I've hired a personal trainer and I'm working hard to get those kilos off."
Feildel explained: "We film the show for five months and [fellow judge] Pete [Evans] and I had eight days off in those five months. We're doing 15-hour days and eating at any time of the day. It is full-on."
British celebrity chef and anti-obesity campaigner Jamie Oliver was recently forced to defend his weight in Australia, saying: "I do my best... working in the food business is quite hard when someone is constantly asking you to try things. I could definitely do better."
Curtis Stone later said that chefs who encourage healthy living have "got to practice what [they] preach", while Gordon Ramsay has previously insisted that professional chefs should never be "fat".
MasterChef judges Matt Preston, George Calombaris and Gary Mehigan have all admitted to struggling with their weight since the show debuted. Preston signed up with a weight-loss company in 2010, while Mehigan described himself as "chubby".
The My Kitchen Rules finals start tonight (March 22) at 7.30pm on the Seven Network.
> 'MasterChef' judge Matt Preston: 'My Kitchen Rules' is fantastic'
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