When marathoner Jamie Shinneman gears up for his long runs, he\u0027ll scarf down a carb-heavy breakfast, lace up his shoes and leave home with the one thing that most runners don\u0027t have \u2014 a teammate.For training runs as long as 20 miles in Noblesville, Indiana, the 53-year-old runs while pushing his wife, Amy Shinneman, in a three-wheeled racing wheelchair they call a "duo bike."\u00a0Jamie is the engine. Amy is the compass. As a "Duo Team," the high school sweethearts have crossed the finish line of four marathons since 2019. It\u0027s an achievement that would mean a lot to any runner, but especially for Amy, who has never been able to run independently."My duo partner helps me to see beyond, sometimes, my limited vision of myself. And I think it\u0027s a good lesson," Amy said.Amy was born with a neuromuscular disease that was officially diagnosed in 2018 as Bethlem myopathy, a rare form of muscular dystrophy that causes progressive muscle weakness and affects mobility.Today, at 52, Amy mostly uses a wheelchair to get around. But on the marathon course, that wheelchair has become a path to freedom."She\u0027s seeing parts of the world she\u0027s never seen before on a trail," Jamie said. "It just filled me, inspired me to keep pushing and just be with her more and more."Amy said she was initially reluctant to Jamie\u0027s suggestion of putting a pause on his solo running career in 2019 to race as a pair instead, an idea inspired by a race wheelchair they saw at the Boston Marathon Expo that year.\u00a0Jamie was eight years into his running journey at the time and was fast enough to qualify for the prestigious Boston Marathon not just once, but twice.\u00a0"Being honest, in the beginning, I really had no interest. I always felt like everywhere I went, I was on display because of the way that I walk. And so my like, first just gut reaction was, \u0027no way, no thank you. I\u0027ll enjoy cheering you on, on the sidelines.\u0027 That was the role that I only ever knew how to do," Amy said.\u00a0For Amy, being a spectator was familiar. Being an athlete \u2014 and having people cheer for her \u2014 was something she never imagined for herself.\u00a0"So I think that was kind of part of it too," she said. "Just even, wrapping my brain around that I could be someone that other people are cheering on at a sporting event."Now, the cheers only get louder for the Shinnemans at each race, as they chase their dream of conquering all eight Abbott World Marathon Majors, the premier series of marathon races.\u00a0They\u0027ve already completed Berlin, Boston, Chicago and New York. Next up is the 2026 Sydney Marathon on Aug. 30, leaving three more \u2014 London, Tokyo and Cape Town \u2014 to meet their goal. The reward, they say, will be much more than the medals."I\u0027ve been through a lot of ups and downs and doubt because of my disability. But now I\u0027m kind of transforming that \u2026 self-doubt into self-belief," Amy said. "Each finish line we cross, the more confident I become that I am going to be able to get through this life, living well and still doing exciting things."The Shinnemans hope their story can help other people with disabilities see what\u0027s possible for themselves, too. That mission helped inspire the name of their team and nonprofit, Team Humbly Courageous."The goal of Humbly Courageous is to help encourage people to live life with humble courage," Jamie said. "They might see a husband and wife Duo Team working together like this and achieving goals that maybe they didn\u0027t think that they could do together."To honor their fifth World Marathon Major in Sydney, the duo has set a goal of raising $26,000 for their nonprofit. Ten percent will be donated to the Muscular Dystrophy Association, while the remainder will be used to purchase a racing wheelchair for a Duo Team that otherwise couldn\u0027t afford one.\u00a0What started as a joint adventure has become something much greater than 26.2 miles \u2014 a journey defined not by pace or personal bests, but by purpose.\u00a0"I hope, and Amy hopes, to inspire other people to use their God-given gifts, get out there \u2014 just help encourage each other," Jamie said. "Be humbly courageous to do something maybe you didn\u0027t think that you could do."