Body weight, BMI, body measurements, calories eaten, calories burned, ideal body weight, muscle mass, percent body fat...it seems like there is nothing but numbers flying around out there when it comes to measuring people's health! Do you know what they all mean? How do you measure your own personal fitness? Do know if it's really the most accurate for you?

Take this quiz and see how much you really know (I like it because it gives an explanation after each answer), and read this article for some great information (or do it the other way around and read the article first -- then you'll do a lot better on the quiz!).