Explore whether it’s possible to out-train a bad diet in this extreme fitness experiment. After consuming over 6,250 calories of fast food, I pushed my body through an intense day of training, ...

They’re running themselves ragged — and possibly fast-tracking Father Time. Ultramarathons are surging in popularity, with more than 100,000 North Americans racing beyond 26.2 miles last year, nearly ...

It has been suggested that too much extreme exercise can be damaging to our health, but researchers have now found that people who can run a mile in less than 4 minutes generally live several years ...

One night in 2022, Joe DeMarco went to the small gym in the back of his chiropractic office in Manchester-by-the-Sea, closed the door, turned out the lights, and spent the next seven hours alone, ...