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 ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. If you're looking for an interesting, highly customizable interval timer for your Windows Phone, ...

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 ...

If you really want a workout, try interval training. Nearly every gym now offers what’s called high intensity interval training, or HIIT; sessions involve pushing yourself to nearly your peak heart ...