Olympians taking part in The Jump 2017 line up have been told to QUIT the show.
Olympic heptathlete Louise Hazel, who took part in series two in 2015, told fellow athletes the risks of injury on the show were too great.
The show faced controversy last year when injuries forced seven contestants, including Tina Hobley and Rebecca Adlington, to withdraw.
Gymnast Beth Tweddle suffered one of its most serious injuries to date, fracturing two vertebrae in her neck.
Many viewers and non-viewers called for The Jump's cancellation, but bosses greenlit a fourth series after a thorough safety review.
Speaking on BBC Radio 5's 5 Live this week, Louise had a stern warning for them all.
"I would advise them, from this point, to withdraw from the competition," she declared. "Pure and simply because going into The Jump, you know there are going to be risks. It's not a matter of, will you get hurt? Yes you will!
"It's a case of 'when', and there are varying degrees of severity of the type of injuries you have on the show."
She continued: I walked away with a whiplash injury - which means that my neck doesn't have the same range of movement that it had before competing in the show.
"To those athletes who have retired, it's okay to take a risk now. We've been held back from doing all of these things we've wanted to do, motorbikes and car racing and go-karting and skiing. But for those athletes still in sport, focus on next year's training and get through that.
"This could quite easily turn into a career-ending injury for those who have the intention of going on to compete in the next Olympics or the next world championship or European championship."
The Jump 2017 is due to begin on C4 by early February.