Completing a marathon eight months after having a baby is an impressive feat in and of itself. But new mum Molly Waitz didn't just run the New York City Marathon on Sunday - she did so while pumping breast milk for her son.
"I never thought I would [run a marathon] and the fact that I was able to do it while working full-time and caring for my child, it was just unbelievable," Ms Waitz told ABC.
Running on behalf of First Candle, a charity supporting those who've lost a baby to SIDS, Ms Waitz, of Cutchogue, New York, pumped at several points along the 42km course, using a portable device.
"I pumped for the first time somewhere between miles three and four and then I did it again right off the Queensboro Bridge, which was mile 16," she said. "I slowed down a little bit to do it but I didn't really have to. You could do it blindfolded."
Proud mum to Bode, Ms Waitz said she wanted to complete the race but needed to work out how she would do it while still breastfeeding. Given a hands-free Willow pump to trial for free, (they retail for $AU $724) the 27 year-old stored the breast pump in her sports bra and ran as her breast milk filled the bag inside the pump.
Ms Waitz finished the race in six hours and 46 minutes and pumped almost half a litre of milk.
"There's a lot of stigma about how should you feed your child," she said. "That's not what I wanted to get across by doing this. It's not that what I was doing was the best thing for every child. They just need to have a happy parent and be loved.
"Whatever you can provide for your child is what's best for them."
And she has a message for other mums with goals and dreams.
"Anything is possible if you want to do it."
Earlier this year British ultra runner Jasmin Paris became the first woman to win the 431-kilometre Montane Spine Race - while expressing breast milk for her daughter along the way.