To get the most out of your personal training sessions and workout classes, it helps to be a good client who knows how things work. Plus, it's always nice to be nice and make things easier for your instructors. We asked several fitness professionals what they wish their clients knew going in and this is what they said.

Getting ready to hit the gym in January? Here's your starter pack of all the information you need to walk into the gym with confidence and build a habit that will last all year long.

The more you know about exercise and the benefits it provides, the more likely you are to do it, and do it right. Here are some helpful facts you should know.

It's easy to feel motivated about the idea of exercising. Let's all run marathons! And do a push-up challenge! But somehow, a lot of our plans never leave the "idea" stage. We're all busy people, right? And it's so hard to find the time.

You can do intense workouts, eat the right foods and take the right supplements, but your muscles won't grow without decent sleep.

The heat can make your usual workout a lot more difficult. It also puts you at risk of heatstroke if you're not careful. If you want to get your sweat on when it's burning up outside, adjusting your intervals can make it a little easier and safer.