IF YOU’RE LOOKING for a style of workout that will push you to your limits without needing to exercise for hours, you only need to understand one four-letter acronym: HIIT. The term stands for high ...

Interval training is a “form” of cardio, where you go through alternating periods of hard work followed by recovery periods. The hard work is harder than normal cardio, and the recovery periods are, ...

The phrase “putting the hammer down” commonly refers to drivers smashing the accelerator pedal to pick up a burst of speed, often to beat a waning yellow light. Runners use this idiom in much the same ...