Think about how you feel doing your 12-3-30 routine on the treadmill versus during a high-intensity interval (HIIT) class. You probably feel like you could maintain that first one for a pretty solid ...

It's called anaerobic endurance, and it's that crucial physical ability that sets apart good athletes from those who truly shine. Whether you're a weekend warrior or a seasoned fitness enthusiast, ...

There may, however, be a shortcut. High-intensity interval training ( HIIT) promises to get you fit with just a few minutes ...