In a stunning display of human endurance, Canadian ultra-runner Stephanie Case has become the first woman to complete a 100-mile race in Antarctica. The 43-year-old human rights lawyer finished second overall in the Antarctic Ice Ultra, crossing the line in 17 hours, 31 minutes and 39 seconds.

A Race Like No Other

The event took place in the Schirmacher Oasis, Queen Maud Land, East Antarctica, and consisted of 38 loops of a 4.2km course. Unusually harsh weather conditions, with temperatures plunging to -35C and severe winds, forced organizers to bring the start forward to 1am on Sunday. Only four of the eight starters managed to finish the 100-mile race, and Case was the sole woman among them.

"When you're out in that environment for 20 minutes it's OK, but when you're out in it for 17 hours or more, it can take a huge toll on the body because you have to expend so much energy just to keep yourself warm," Case told BBC Sport. "The thing is that you need to run fast, but you need to do it in a way that you don't sweat, because if you sweat, that's a killer. It will make you cold instantly."

Case took brief breaks roughly every 26 miles to refuel and manage the extreme conditions. She also had to contend with the unique challenge of toilet breaks in an environment where leaving any trace is forbidden. "Going to the bathroom, when you are wearing so many layers and taking off your gloves for even five seconds can put your hands at risk of frostbite, it was a real challenge," she said.

Despite the hardships, Case found moments of joy, running alongside penguins and taking in the surreal landscape. "The environment is so harsh, and things can go wrong so quickly... It was just relief when I crossed the finish line that I'd actually done it and in a time that I was super proud of. It was just an outpouring of emotion."

Pushing the Limits

Case finished 29 minutes behind Chinese runner Yusheng Ni, who shattered his own world record by over five and a half hours. Ni, who has completed more than 500 ultramarathons, provided stiff competition. "There were parts where I was 60 seconds behind him or I was sometimes just 200 metres behind him. It was a real race. But whenever he saw me getting close, he would look behind and he would just take off. I think we really pushed each other to get our best performances," Case said.

Previously, only men had attempted the 100-mile distance in Antarctica. Case's achievement is particularly significant on a continent historically described as the "womanless continent." She hopes to inspire other women and mothers. "I know that when I'm going out and doing the things that make me feel happy and whole, it makes me a better mum and I can come home and show my daughter all the things that she might want to do and all the things that are possible for women," she said.

Last year, Case went viral for breastfeeding her baby daughter Pepper during a victory at an ultramarathon in Snowdonia. While the response was largely positive, some backlash inspired her to take on this challenge. "I felt like the best way to clap back at anyone who thought that I should be at home with my baby was to go to the most extreme place on Earth and try to get the record," she explained.

Case's historic run not only cements her status as one of the world's toughest endurance athletes but also sends a powerful message about motherhood and determination.