Tonight's episode of the Channel 4 sports contest saw the celebrities split in to groups for the snow cross event.
It involved them skating down a 175 metre track while navigating four obstacles: a 'corkscrew' turn, a slalom, punchbags and rollers.
Emma Parker Bowles and Lydia Bright were grouped with Kadeena for their heat, and they were nervous about taking on a gold medallist athlete.
"Kadeena is definitely my most feared competitor," said Lydia. "She's got that fighting spirit, I can see her doing some serious damage."
However, Emma and Kadeena crashed at the slalom - and after scrambling back up, they both fell again in the final stretch.
While Lydia claimed victory, her rivals were left crawling to the finish line, and Kadeena narrowly managed to take second place.
This meant she had to compete against the other runners-up in a second chance race to avoid facing the jump.
However, it turned out that her rough first outing had left Kadeena - who was diagnosed with multiple sclerosis in 2014 - unwell, and she was given a pass to next week.
Presenter Davina McCall explained: "Now, Kadeena, she took part in a very hard fought snow cross heat earlier, and following that she's suffering from symptoms associated with her MS.
"She's being looked after, and the medics have asked her to get a bit of rest.
"So she's not going to be racing again tonight, but we will look forward to seeing her in the skeleton next week."
The 25-year-old was the second contestant to get a bye to week three, after a leg injury ruled Sir Bradley Wiggins out of the snow cross event entirely.
Mark Dolan eventually became the second person eliminated after recording the shortest ski jump of the night.
The Jump continues next Sunday at 7.30pm on Channel 4.