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Calgary ultra-runner Jacob Puzey sprinted his way to victory last week, breaking the world record for the fastest 50-mile run on a treadmill.

The U.S.-born Puzey completed the challenge in 4:57:45, which was almost an hour faster than the previous record of 5:57:31 over the 80-kilometre distance.

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“Most people get bored on a treadmill, but I don’t,” Puzey said with a laugh. “I’ve always known I have good endurance, so it was more an experiment to see if I could lock into a pace and see how long I could sustain it.”

Puzey, his wife Amy and their six-month-old daughter, Ashima, had planned on travelling to The Running Event Conference and Trade Show in Orlando, Fla., and when Puzey heard one of the running activities scheduled was a treadmill challenge on Dec. 1, he was curious to see how he’d do.

Unlike other ultra-running events typically held outdoors, Puzey said it was amazing to see so many runners he’d met over the years all in once place cheering him on.