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How long does it take for your heart rate to go from max to resting heart rate?
That completely depends on your physical condition.
Is 144 heart rate dangerous for a 87 year old male?
If you are not undertaking significant aerobic exercise - such as running long distances several times a week, then Google 'Heart Block' and see a doctor soon!
Why after dancing the heart rate stays fast for a long time?
In order to distribute oxygen to the muscle cells needed to dance, the blood must pump at an increased rate over the resting heart rate. At the end of exercise, there is still a defiency of oxygen and often anaerobic respiration (no oxygen present) takes place leaving lactic acid in the muscle cells. To return to baseline, the lactic acid must be removed by facilitating aerobic respiration (oxygen present).
What happens to a person's heart rate as that persons increases its or her activity level?
As your level of activity rises, your heart rate speeds up: you need to pump more blood to get sufficient oxygen to your muscles. In the long term, as you become more and more fit, your resting heart rate decreases: a more efficient heart needs to pump less often. At the peak of his physical fitness, Lance Armstrong was said to have a resting heart rate of around 45 beats per minute. That's about 25% slower than an average healthy person of the same age.
Is 90 beats per minute a normal resting heart beat for a 22 year old male?
The average resting heartbeat for all humans before reaching the age of approximately 45 is 72 beats per minute. 90 BPM as a resting pulse is high when compared to the average. However, there is no cause for alarm as long as you are healthy and not having any symptoms of a problem. A higher pulse simply means that your heart is emitting an insignificantly smaller amount of blood when compared to an average heart beat. Consequently, your heart will beat more to provide the blood needed for the body. There are many benign reasons to account for elevated resting pulse rates including stress, tension, anxiety and adrenaline. There are also malevolent reasons such as high blood pressure. If you are athletic, your resting heartbeat will decline. As you age, your resting heartbeat can increase (although will not necessarily do so) and should not do so significantly. Generally, there is no cause for concern as you are within the range of normal.
