Maximum Heart Rate -
The rate at which the heart beats every minute is measured in terms of Beats per Minute (bpm). Also defined as the number of pulses of the heart in a minute or the number of times the heart expands and contracts in a minute, the range of the normal adult heart rate is around 70 bpm in males 75 bpm in females, but this may vary between people. In a child, it ranges from 80-120 bpm. While at rest, it ranges 24 to 44 beats per minute. Analyzing the heart rate of an individual can give a quick overview of his general health condition.
What is Maximum Heart Rate?
A heart can beat the fastest when an individual is involved in any activity. How hard and fast can a heart beat per minute, without resulting in a fibrillation can be measured in terms of 'Maximum Heart Rate' (MHR)? The maximum allowable heart rate can be estimated by subtracting an individual's age from 220. Rather than measuring the peak of the heart rate during any activity, it is easier to calculate the Maximum Heart Rate with the formula - 220 deducted by age in years.
The MHR varies in the human beings with the age, levels of fitness. More the age of a person, lower is the Maximum Heart Rate count.
More about Maximum Heart Rate -
A healthy heart would not be damaged when the heart rate exceeds the given MHR count. Or else, many athletes who train their hearts to the extremes of the MHR would have their hearts damaged. A healthy heart's muscles would not be burnt or damaged even if the heart rate exceeds 90% of the MHR. A true MHR is the highest heart rate attained at the highest level of activity, so by its very definition, MHR is impossible to be exceeded. Regular training lowers the MHR as well as the resting heart rate. This happens because the muscles which are exercised become more strong and efficient, and pump more blood at each beat.
Some facts and figures about Maximum Heart Rate -
With age, MHR drops down from around 220 bpm in children to around 160 bpm at the age of 60. which would be a drop of 1 bpm per year. There is no evidence showing that the training affects the decline. The best way of calculating the MHR is a stress test than the age-related formula, since the MHR still varies between individuals of the same age. But the resting heart rate is affected by endurance training to a great extent.
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