Body Mass Index
Measure of the relationship between height and weight; calculated by dividing weight in kilograms by height in centimeters squared. "Normal" BMI for women is 19-25% and for men is 14-20%.

Waist to Hip Ratio
A calculation of the proportion of fat stored on your body around your waist and hips. Formula: waist measurement divided by hip measurement. Women should have a ratio of .8 or less; men should have a ratio of .95 or less.

Target Heart Rate Range
The recommended range is 60-85% of your maximum heart rate. It represents a pace that ensures you are training aerobically and can reasonably be maintained.