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 ...

Looking for a fountain of youth? You may need to search no further than your sneakers. Exercise, particularly high-intensity interval training, encourages your cells to make more proteins to feed ...

Think of high-intensity interval training (HIIT) like baking: You need a precise amount of time in the oven along with a cooling-down period. In workout terms, that means balancing intervals of more ...