Training camp isn't for everyone.
One celebrity has already called it quits on season four of Special Forces: World's Toughest Test.
During the Fox reality competition series' Sept. 25 premiere, the new recruits' strength and endurance were put to the test on day one as the stars were immediately split into two teams and tasked with repelling down from a helicopter hovering high in the sky above the Moroccan desert.
The challenge proved difficult for Brittany Cartwright right off the bat.
After they landed safe on the ground, the recruits then had to carry enormous barrels and heavy bags of grains and other equipment needed for the rugged camp site where they will be living throughout the season. The strenuous task left many stars exhausted, especially Brittany.
"I'm, like, dying, sorry," the out-of-breath Bravolebrity told Special Forces trainer Jovon "Q" Quarles. "I can't. I don’t think I can make it."
In a confessional, The Valley star reflected on feeling out of shape amid the intense competition.
"I’m not the fittest I’ve ever been in my life, that’s for sure," Brittany—who shares son Cruz, 4, with ex Jax Taylor—shared. "But chasing around my 4-year-old has been very helpful."
Ultimately, Brittany's team was the slowest to complete gathering their survival necessities and, as punishment, had to run back to camp on foot.
The news sent Brittany spiraling as she reacted, "I’m gonna have a panic attack."
Although the Vanderpump Rules alum attempted to keep up with her costars, she hit a wall 500 yards into the sprint.
"I feel like I’m gonna pass out," she told Q as he tried to motivate her to finish. "I’m sorry."
While Q reminded Brittany, "You know what this means, right?" the 36-year-old insisted, "I don’t want to be the first to go, but…"
Q encouraged her, "You gottta dig deep and figure out how bad you want this s--t."
Unfortunately, Brittany couldn't gather the strength to continue on in the competition as she noted, "I can’t, I’m gonna throw up. I’m really sorry, I feel like s--t."
A defeated Brittany lamented after agreeing to go home, "I knew I was gonna be first. I f--king knew it. So embarrassing."
With Brittany being the first celeb to go home, that left 17 stars still in the competition, including fellow Bravolebrities Teresa Giudice, Gia Giudice and Eva Marcille, former Empire star Jussie Smollett, Sister Wives' Kody Brown, couples Eric Decker and Jessie James Decker and Shawn Johnson and Andrew East and podcaster Brianna "Chickenfry" LaPaglia, among others.
Special Forces: World's Toughest Test airs Thursdays at 9 p.m. on Fox.
In the meantime, keep reading to meet all the celebs competing on season four.
Brittany Cartwright: Quit Day 1
TV Personality
Eva Marcille: Discharged Day 2
Actress & Model
Teresa Giudice: Quit Day 2
TV Personality
Jussie Smollett: Medically Withdrawn Day 3
Actor/Singer
Johnny Manziel: Quit Day 4
Heisman Winner and Former NFL Quarterback
Nick Young: Quit Day 5
NBA Champion
Ravi V. Patel: Quit Day 5
Actor
Chanel Iman: Withdrawn Day 6
Supermodel
Eric Decker: Medically Withdrawn Day 6
Former NFL Player
Jessie James Decker: Quit Day 6
Country Music Artist
Mark Estes: Medically Withdrawn Day 7
Internet Personality
Christie Pearce Rampone: Medically Withdrawn Day 7
World Cup and Olympic Soccer Champion
Gia Giudice
TV Personality
Kody Brown
TV Personality
Andrew East
Former NFL Player
Shawn Johnson
Olympic Gymnastics Gold Medalist
Brianna "Chickenfry" LaPaglia
Internet Personality
Randall Cobb
NFL Pro Bowler