What Is Double Threshold Training? What Runners Need to Know Before Trying the Plan.
SCROLL THROUGH RUNNING TikTok or watch enough YouTube workout videos and you’ll start seeing the phrase “double threshold” pop up. It’s a training method associated with seemingly superhuman elite athletes: Norwegian Jakob Ingebrigtsen, the Olympic Champion in the 1500 meters and 5000 meters; Australian record holder in the mile Cameron Meyers; U.S. 10K champion Emily …
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