Runkeeper was placed on Earth by supreme beings of some sort. Its programmable, GPS-tracked interval runs make the iPhone into a serious, and entirely thoughtless, training tool. But Runkeeper’s ...

When 3 p.m. rolls around, my energy levels are usually at a low — the midday slump is in full effect, and another cup of coffee would only deliver a case of caffeine jitters. What is helpful though, ...

The accurately poetic acronym HIIT stands for high-intensity interval training. A HIIT workout mixes shorts bursts of activity with even shorter rest periods. Ideally, you work to your maximum ...

The American Heart Association recommends that adults get "at least 150 minutes per week of moderate-intensity aerobic activity or 75 minutes per week of vigorous aerobic activity" — or a combination ...

HIIT workouts, or high-intensity interval training, are an effective way to exercise at home. Instead of requiring equipment, HIIT workouts focus entirely on bodyweight exercises. This expert-designed ...

For those of you who don't know, I wrote an interval timer app for iOS. A feature request is to allow it to run in the background. Apparently people fidget with their Music or Podcast app enough while ...

One of the biggest myths I hear is that walking is not a good workout. People often see it as a leisurely activity or a means of transportation, but not as a form of exercise. This could not be ...