It may be useful to define 'heart rate' so that we understand what the numbers mean
Heart rate, also known as pulse, is the number of times a person's heart beats per minute. A normal heart rate depends on the individual, age, body size, heart conditions, whether the person is sitting or moving, medication use and even air temperature.
When a person is at rest, that is like you have just woken up in the morning a heart rate of 60 bpm is considered normal.
A trained athlete has the ability to move blood around the body efficiently with a lower heart rate than an untrained person and some cyclist have a heart rate that would be considered dangerous in anyone else. Before embarking on a quest to improve in this area it would be a good idea to eliminate any medical problems.