Mistakes at the gym can prevent you from seeing results. Can you flag the fitness don'ts?

A balanced diet can rev up your mojo. See if you can spot the energy-boosting eats.

You make choices every time you walk the grocery aisles or into your kitchen. But are your food decisions as healthy as they could be? Find out!

How good are you at sussing out the virus and bacteria traps at home, at work, and at the gym? Test your germ IQ here.

Do you know what it takes to keep cholesterol levels under control? Test your knowledge here.

Can you navigate restaurant menus like a pro? Here’s how to choose the healthiest options.

Ouch! Sometimes getting fit hurts. Do you know what to do when you feel a twinge?

Are your habits putting you at risk for getting sick? Test your swine flu smarts.

Which everyday habits cause you to lose steam, and which ones give you a boost?

Poor form can sabotage your workout. Do you know which smart strategies can help you get fit faster?

Do calorie traps trip you up? From breakfast to last call, learn which foods are the healthier choices.

Are you smart about nutrition? Test your healthy eating knowledge with this quiz.

Knowing your body can help make sex safer, more sensual and more fun. Take this quiz to test your sex smarts.

Skin cancer prevention starts with awareness. Are you smart about protecting your skin from the sun?

Cheers to your waistline! Test your cocktail calorie IQ to maintain a healthy weight. But be warned: A few of your favorites might just pop up on the Most Wanted list for sky-high calorie counts.

How big is a single serving of peanut butter, pasta or cheese? You might be surprised at these answers.

Think you can pop a multivitamin and call it a day? Think again. Test your vitamin IQ with the help of Ashley Koff, RD, FITNESS advisory board member and author of Mom Energy: A Simple Plan to Live Fully Charged, to see which nutrient sources you're leaving untapped.