Season 1

The members go to the swimming pool together for the first time. A special coach is invited to help with their training, and the members are tested to see their current level. Even though it was a short training, they improved a lot. After training by themselves for weeks, the members are gathered at the Jamsil Tower. They will do a vertical marathon which is going up 123 floors by stairs.

The members are gathered to train for cycling. After swimming, they need to ride bicycles for 40km. Seo Yeon, Ju Hyun, and In Ah are excited as it’s fun and refreshing to ride bikes. However, Uie must overcome her trauma first to learn how to ride bicycles. A few weeks later, the members are gathered at a CrossFit gym. They try a few exercises that will help them get ready for the triathlon.

The members go to Yangpyeong for their first outdoor cycling. Since it’s a practice run, they will take a 15km course and have a hearty meal, the famous cold chicken noodles. Everyone is excited and enjoys the beautiful scenery except for Uie who is still not comfortable riding bicycles. After the cycling, the members are gathered again at a swimming pool, and a relay swimming competition begins. Stay tuned!

The members leave for Jeju Island for a training camp. A special coach to help the members complete the triathlon shows up. Sports Genius Seol In Ah faces a crisis and ends up riding a bike only with one foot. Meanwhile, Uie goes through special training with her personal coach Kim Dong Hyun. After the training, the members go out for a 22km outdoor ride and enjoy an exciting dinner. Stay tuned to check out!

The last morning of the training camp on Jeju Island! The members go through the first open water training in the natural pool at Panpo Port. With Korea’s first triathlon champion, Coach Heo Min Ho’s special lesson for open water swimming, a new ace swimmer emerges! And the members go for a 5km run again, hoping to shorten their previous records. Stay tuned to check out!

The real-life practical training for triathlon begins now! With two months left until the World Triathlon Cup Tongyeong, Coach Heo Min Ho steps up to help Seo Yeon and Ju Hyun, the novices at swimming. A customized training session for Seo Yeon and Ju Hyun takes place at a 5m deep pool! And Iron Girls finally make their 10km marathon debut. What will Iron Girls’ records be like after two months of training?

With 48 days left until the 2024 World Triathlon Cup Tongyeong, Iron Girls challenge the Sammaksa uphill course with steep slopes! The members have endured all the training sessions bravely, but they end up bursting into tears, dazed by the intensity of the training. How will the grueling training session go? And they try swimming across the Han River for the first time! Stay tuned to check out Iron Girls’ remarkable growth!

The high-intensity training for Iron Girls is being revealed! The members go through the harsh training designed for national triathletes. How will the training session end? And Iron Girls are entering the Samcheok Triathlon Competition for real-life experience. What will their records be like after the three months of training? Iron Girls are all set to go, but they are faced with unexpected difficulties. Stay tuned to find out more!

Last week, Iron Girls started their first mock triathlon competition for the first time in their lives. But even the first event of swimming is not easy to complete. Jin Seo Yeon is left alone at the swimming course with only 11 minutes left until the cutoff. What will happen to her? Iron Girls face various difficulties during the 40km-cycling and 10km-running courses. How will they deal with the unexpected situations and excruciating pains? Stay tuned to check out!

The day of the World Triathlon Cup Tongyeong has finally arrived! The first event of swimming begins with tension. Will Seo Yeon, who has a fear of water, be able to finish the course in 50 minutes? In the second event of cycling, Uie is faced with an unexpected situation and bursts into tears. As soon as Ju Hyun starts cycling, the chain comes off, and she has a mental breakdown. Sports Genius In Ah, who successfully completed swimming and cycling, complains of knee pain while running. How will Iron Girls’ 120-day journey toward the completion of the triathlon end?