While "Chicago Fire" is on hiatus due to the Sochi Olympics, series star Monica Raymund trained like an olympian for a series of webisodes that are airing during the winter games. 

Raymund said she had to physically prepare for her character's upcoming firefighter academy test. 

"Was my body prepared? No. We started shooting those episodes after the holidays, so after two weeks of just, like, eating," Raymund told TVGuide.com. 

She said she had to power through to do a 14-hour camera test. "It was all me. All 14 hours. All the cardio," she said. "By the end of it, some of my crew members were applauding and they were like, 'You go girl!'"

Raymund's character, Gabriella Dawson, put her training to use in a series of webisodes. The webisodes, which debuted Tuesday on NBC.com, are a series of four installments that chronicle Dawson responding to an emergency when she is the only one at Firehouse 51. 

"Somebody's hurt in this car accident down the street, and there's nobody around so ... I'm the only person around to help the guy," Raymund said. "I have to help this guy get out of the car before it blows up."

She said she was "humbled" to get the call from the producers about filming the webisodes. 

"I'm very flattered. I'm pretty up for the challenge," she said. "I love the show. I love representing women on the show, and hopefully female firefighters, so any opportunity, I'm going to jump on it."

Raymund said she got the idea for her character to train to be a firefighter when her character helped Casey (Jesse Spencer) deliver a baby in the middle of a car pileup. 

"I became very compelled with the physicality of it and especially ... I think just the extreme challenge of what that would be," Raymund said. "I am simply insatiable. I want to try everything once."

Raymund said she had to do intense training before the 14-hour test, including strength training, heavy cardio and mask training. 

"When we were first training with the masks, I had a really hard time," she explained. "I have a little bit of anxiety disorder so I can get panic attacks now and then, and claustrophobia is one of the triggers of that," she says. "I'm trying to feel like a total badass and inside, I'm absolutely dying."

While Raymund made it through the training, her character still has to tackle her biggest challenge yet: her relationship with Casey. 

"I think he's scared of me becoming a firefighter. Why? Because it's extremely dangerous. It's a job of life or death. it's that element that I think really attracts Dawson to him even more and proves his love for her, but then there's another element to the conversation where I'm a woman, and he might see me as potentially in harm's way, but who's to say that I'm not as capable as Casey or anyone else," she said. "That starts to permeate within her relationship."

While she said that viewers will see Dawson take the official firefighter's test, Raymund said viewers may not know until next season whether her character will become a full-fledged firefighter or go back to being a paramedic. 

While the webisodes mostly focus on Dawson, the first and last installments will include Cruz (Joe Minoso), Mouch (Christian Stolte), and Hermann (David Eigenberg). 

Regular episodes of "Chicago Fire" return on Tuesday, Feb. 25 at 10 p.m. EST on NBC.