Interval running condenses the powerful effects of regular running into shorter, high-intensity bursts. Research shows it can ...
How important is intensity? I'm in my mid-40s, I’ve been running for a year, and I’m a big guy (6'3”, 240lbs). I run mainly to improve my health and I’m not out to break records. I am wondering if ...
Each day the government shutdown continues, Rob Perez adds a mile to his run. Ultramarathoners are intense, but that’s what ...
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