I am not quite sure what WW stand for. Congratulations on your weight loss and exercise program. With regards to your heart rate, the normal heart rate is typically between 60 and 100. Sometimes, individuals, particularly, conditioned atheletes and the elderly can have resting heart rates in the 50's. This may be entirely normal. It is reassuring that you are not having symptoms of lightheadedness, or feeling faint or fatigued. Of course, the safest thing to do is to get evaluated by your physician. Your doctor will be able to listen to your heart, check your pulse, review an EKG, and decide if your slow resting heart rate warrants any further evaluation.