When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Countdown Interval Timer is a fitness app available for Windows 10 PC and Mobile that is designed ...

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 ...

There’s a lot of talk in the exercise world about high intensity interval training (HIIT) lately, which is exactly what it sounds like — alternating episodes of exercise with periods of less intensive ...