What should a Pulse rate be for a teen?

hi everyone i just did a pulse rate test in walmart and ,and my pulse red 44 and i did the test again and it was 46. Im 17 years old 6'4 185 pounds and i am in really good shape and participate in athletics every day,work out 4-5 times a week and play rep sports. what should my pulse be??? is that low. ???????