Even if you’re not a workout buff, you’ve probably heard of HIIT workouts — aka high-intensity interval training. It’s comprised of quick bursts of activity followed by short recovery periods. HIIT is the workout du jour for a number of reasons.

Have all your selfies sprouted second chins lately? Thankfully, neck and chin toning can be achieved without surgery -- all it takes is adding a few targeted exercises to your workout.

Movie stars may be blessed at birth with good looks, but when it comes to building bodies that will make a lasting impression, they have to put in the work -- just like the rest of us. We asked the LIVESTRONG.

When it comes to exercise, the magic number might be two -- as in your partner plus you. Studies have shown that people work out longer and harder when they have company. And the University of Oxford found that the endorphin release from activity is significantly greater in group training than in individual training.

Have you ever checked out a guy on the beach with that V-shaped back? You know: That broad, masculine frame with a slim, athletic waist? Or have you admired women who dare to bare their backs?

Water aerobics routines give you a low-impact alternative to many popular exercises like running or lifting weights.

The long-term effects of aerobic exercise include improved longevity, a healthy body weight and reduced chronic disease risk.

Zumba is a hot fitness craze that attracts those who want a party instead of a grind. The origins of the class are in Latin dance.

Running in place can raise your heart rate and serve as cardio if you have no other options. But you're best off running outside or on a treadmill.

Your body uses glycogen for fuel during exercise. If you don't refuel during long workouts or train your body to use fat, you can easily bonk.

Weight-training programs often focus on three related muscular attributes: strength, stamina and endurance. Though these are all related, they are distinct concepts as related to your physical abilities.

Body fat is a fickle foe -- easy to gain and tough to get rid of. Areas like the lower back, hips and obliques can be especially problematic, particularly if you have a body type that tends to pack on fat around the middle.