The Basics of Exercise 

We have over 600 muscles in our bodies that help bind us together, hold us up, and help us move. Your muscles also need your constant attention, because the way you treat them on a daily basis determines whether they will wither or grow. We like this TED talk - it illustrates how a good mix of sleep, nutrition and exercise keep your muscles as big and strong as possible.

You can’t out-exercise a bad diet. Why working out is great for health, but not for weight loss, explained in five minutes.

We hear about calories all the time: How many calories are in this cookie? How many are burned by doing 100 jumping jacks, or long-distance running, or fidgeting? But what is a calorie, really? And how many of them do we actually need? This video explains how a few different factors should go into determining the recommended amount for each person.

The FDA recommends that we eat a balanced diet of 2,000 calories a day. Some days we do a better job passing on the pizza and reaching for a salad, and some days it's digging into a full pint of ice cream sort of day. Here's what 2,000 calories of various food items look like.

Leading a more active lifestyle takes time, effort, and determination, but in the end, it's really worth the shot. Here's what will happen to your body when you exercise regularly.