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 ...

Anaerobic exercise uses glucose for energy, instead of oxygen. Aerobic (cardio) and anaerobic exercises both improve health, but only anaerobic exercises build muscle mass and strength. Anaerobic ...

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When it comes to exercise, most people think of popular cardio activities such as running, swimming or cycling. While each of these are great ways of getting your heart rate up, toning your muscles ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." On practically every “types of aerobic exercise” list, cycling is one of the primary examples. And for ...

Throughout my life, I had identified as a long-distance runner, competing in high-school cross-country and working up to half marathons. But looking back, I now realize my running background contains ...

Here’s what your LT1 and LT2 say about your performance potential and how you should be training ...