Amanda MacMillan is a Brooklyn, New York–based freelance writer, triathlete, and health blogger for self.com.
These products claim to tone muscles and speed workout recovery. But the jury is out as to whether they’re worth the hefty price tag.
If you thought osteoporosis was only an issue for women and older men, you were wrong.
A new theory behind the elusive runner's high.
The biological reasoning behind our favorite pre-race laxative.
How much water you actually need to drink and how to make sure you're actually drinking it.
You’re strong when you run flats but as soon as you hit a hill, you’re gasping like a fish on land. Here’s what’s going on.
The downside of doing a different workout every day
The pull-up is one of the oldest exercises in the book, so struggling with it (and all the workouts that call for it) can be seriously frustrating.
First it was indoor cycling, then CrossFit; now boxing is having its moment in the fitness-trend spotlight.
You're not just imagining things: Doctors often refer to the 72 hours after an intense fitness event (like a marathon, ultra, or long-distance triathlon) as the "open window" for infection, says Nate...
It's a great fitness tool—but there are other ways to use it besides swings.
I've been eyeing a course record, but this summer heat is making me lethargic. Any advice on tackling the perfect ride?
Any time you increase the duration or the intensity of your workouts, you also increase your risk of injury.
When researchers tested blood samples of runners after each stage of a multi-day ultramarathon, they found that almost all of them had elevated levels of toxic gut bacteria.
You don't have to stand all day long to escape the dangers of too much sitting—a public health threat that's been dubbed "the new smoking." In fact, a new consensus statement suggests that being on...