Dancing On Ice stand-in Matt Richardson was left with a concussion after suffering a head injury.
The 29-year-old got the injury seconds after starting his training, according to reports.
He was preparing for next year’s series of the ITV show, on which he is a stand-in in case a main contestant has to drop out.
A source told The Sun: ‘Matt was keen as mustard to get out on to the rink. But once he was on there, it turned to disaster.
‘He was skating with a pole when he fell and landed on his head. There was a nasty cut and he suffered concussion.
‘Matt put a brave face on it but he was shaken up. It was a reminder of how hard the show is and how dangerous taking part can be.’
The 2021 contestants include Olympic star Colin Jackson, TV star Denise van Outen, The Mummy Diaries’ Billie Faiers, ex-Corrie actress Faye Brookes and Olympic skier Graham Bell.
Jason Donovan, Emmerdale’s Joe-Warren Plant, Lady Leshurr, Myleene Klass, Rebekah Vardy, comedian Rufus Hound and radio host Sonny Jay are also competing.
With the show taking place at the start of next year, Graham Bell recently revealed some of the plans to ensure it can still go ahead despite the ongoing coronavirus pandemic.
The cast are undergoing coronavirus tests a week before they begin the first segment of filming, with Graham adding: ‘We have what’s called a close cohort relationship and I think they’re doing it in mini bubbles.
‘So it would be me and my professional skating partner, plus a coach in one bubble. We don’t think we will need to isolate with each other – they’re not going to move in as far as I know, though that would be really good for training!’