THE CONDUCTION SYSTEM (ELECTRICAL SYSTEM): HOW FAST CAN A HEART BEAT?
As you age, it may seem as if your body is slowing down. In fact, your heart rate actually does slow with age. The decrease is not noticeable during everyday activities, but your maximal heart rate during exercise decreases as you grow older. For example, your maximal heart rate at age 25 is about 200 beats per minute. By age 65, your maximal heart rate is only about 155 beats per minute.
The heart rate may also slow as a desirable result of being in good physical condition. An athlete's heart often beats slower than normal because training has allowed the heart to contract more strongly and pump more blood with each beat. As a result, the heart does not need to beat as fast to produce normal blood flow.
Cardio & Blood