Get your core in tip-top summer shape with Tone It Up's new 10-minute workout. This routine is equipment-free and perfect for the outdoors.

Knees are tricky. Like a lot of things, you don't really realize how much they do for you—until they stop working properly. And anyone who's ever had knee pain or a knee injury knows just how debilitating they can be.

This challenge will get you a six-pack in time for summer. You can achieve this in just a few minutes each day with free online videos -- no equipment needed.

Thanks to activity trackers, more and more people are motivated to not only count their daily steps, but also to make their steps count.

Bored of the same old kettlebell exercises? Or maybe you’ve yet to incorporate them into your fitness routine. The kettlebell is a heart-pumping, muscle-sculpting, full-body exercise tool that can be used for a wide variety of workouts. Kettlebells are often used in compound movements (i.e.

Whether you’re a fitness newbie or a bonafide gym rat, you might have some bad workout habits. When you're not getting the fat loss or muscle gains you're seeking, it may be time to reevaluate your approach. Use the checklist on the next slides to identify ways you may be sabotaging your results.

After a long, stressful day at the office, it can be challenging to relax in the evening, and you may still feel too revved up at bedtime. While some people turn to a glass of wine or two to unwind, that can actually make it harder to get restful sleep.

If you’ve been off your gym game for a bit, you may be wondering how long it’ll take to get back all your hard-earned fitness gains. Here’s what to expect.

Psychology is the study of behavior. Behavior can be assessed through observation as well as psychological tests. Test results provide a sampling of a person's characteristics or traits. As such, they can be used to help predict future behavior.

Strength training is a must when it comes to your fitness routine, especially for women. Research continues to pile up showing that strength training is a powerful tool in the management of heart disease, diabetes, stroke, high blood pressure, osteoporosis and age-related weight gain.

This workout is your legs’ best friend, acting as your virtual four-inch heels and making your legs look longer and leaner. So what are you waiting for? Build shapely legs with the lean, sexy legs workout.

Anyone who’s spent a sleepless night channel surfing or perused the magazine rack in the grocery store can’t help but notice the number of infomercials and articles claiming to be the “next best thing” for winning the “battle of the bulge.