One form of exercise that an ever-growing number of people are doing is called high-intensity interval training, or HIIT. "It's become so popular due to its efficiency, its effectiveness in ...
HIIT workout obsessives, have no fear: this trend is in no danger of waning. Over 12k of you Google it monthly, and it's now practised by the likes of Beyoncé and Jessica Alba, but it's been ...
You can do these on a track, around your neighborhood, or a treadmill. Gatlin suggests the following workout for runners who want to get stronger and faster: Incorporating HIIT into your training ...