World-champion speedskater Apolo Ohno has made a monumental decision—to come out of retirement and tackle the ultimate athletic feat: the 2014 IRONMAN World Championship. Teaming up with Women's Health magazine's Jen Ator, Apolo embarks on a journey that promises to test his endurance and redefine his limits.

In "Mission Apolo: BUILT WITH CHOCOLATE MILK™," a compelling eight-part webisode series, viewers are invited into the world of elite endurance training. The series captures the highs and lows of Apolo and Jen's preparation for the IRONMAN, showcasing their dedication and the transformative power of resilience.

The adventure kicks off with NFL legend Hines Ward, a seasoned IRONMAN competitor, officially passing the torch to Apolo and Jen. Their support team reads like a who's who of IRONMAN greatness: Paula Newby Fraser, Craig 'Crowie' Alexander, Mirinda Carfrae, Luke McKenzie, and nutrition expert Wendy Bazilian. Each brings invaluable expertise and motivation to Apolo and Jen's quest for excellence.

As they navigate grueling training sessions and intense physical demands, Apolo and Jen draw inspiration from their mentors and each other. Selected video clips from TIME.com provide a glimpse into their preparation and the camaraderie that drives them forward.

Join us as we follow Apolo Ohno and Jen Ator's remarkable journey to the starting line of the 2014 IRONMAN World Championship. Together, they embody the spirit of perseverance and the pursuit of greatness—proof that with determination and support, any challenge can be conquered.