Experts are increasingly urging people to know their BMI, a figure that takes into account not just weight but also height to indicate body fat.
The more active you are, the more calories you burn. Running or jogging, for instance, burns more calories than bowling.
Your target heart rate is the range at which sustained physical activity - running, cycling, swimming laps, or any other aerobic exercise - is considered safe and effective.
It is important to know your estimated due date in order to help plan for the baby's birth.