The actor showed his six-pack as a police officer David Budd in the BBC drama.
But he says his body is "a cheat" from an intense fitness regime.
And the 32-year-old believes the ITV2 reality show is preventing real actors from auditioning for potential telly roles if they do not have the "perfect" body type.
"It is not realistic," he said. "Not everyone will go around with a six-pack, unless they're in Love Island.
" I only get a six-pack if I do not eat and do not work for months "
"It sucks, because it hinders people looking for a job, I mean, do they really work for months just for that month?
" Or are all the people on Love Island genetically gifted? I only have a six pack if I do not eat and work for months. It's not true. "
Meanwhile, bookmakers have reduced the odds of Game of Thrones' star Madden, following in the footsteps of Sean Connery as the second Scotsman James Bond.
Ladbrokes tipped him 1
<img src = "https://cdn.images.dailystar.co.uk/img/static/placeholder-horizontal.gif" class = "photo kalooga_12952 swap" alt = "Jack Fowler  TIM MERRY
The creator of bodyguards Jed Mercurio spoke of his doubts in staring at Richard after the success of the series.
The writer said: "It is the original article, a true protagonist.
" This role has put him very much in the spotlight for bigger things.
"For certain signing roles, some leading roles, I could not think of a better candidate!"  Related articles