Cart is empty Even if you’re a runner, you may not have heard the term “Jeffing” before. It’s a method of alternating between running and walking and it’s become a popular way to train for long-distance races.
Even if you’re a runner, you may not have heard the term “Jeffing” before. It’s a method of alternating between running and walking and it’s become a popular way to train for long-distance races.
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