Chasing His Limits, Altra Runner Zach Bitter Breaks 100-Mile Record

Altra-sponsored endurance athlete Zach Bitter set out to test the limits of both his body and mind in August when he lined up on the track at the Pettit Center in Milwaukee, Wisconsin to break the 100-mile world record. Almost half a day later, he crossed the finish line, setting the new record at 11:19:13.

Here's how he did it.

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