United Kingdom, Aug. 13 -- Brittany Cartwright cried "at least three times" on Special Forces: World's Toughest Test.

The 36-year-old reality star appears on season four of Special Forces, the quasi-military training TV series, and Brittany has described competing on the show as the "hardest thing" she's ever done.

During an appearance on the Detox Retox With Tom Schwartz podcast, Brittany shared: "It was the hardest thing I have ever done in my life.

"I've been very open about heights and how that terrifies me so doing different things like that, I'm proud of myself."

The reality star acknowledged that she pushed herself to her physical and emotional limits on the show.

Brittany also watched old episodes, including some featuring To...