Immediately following exercise, the heart is beating the at the fastest rate it will pump for that physical activity. If one were graphing the number of heartbeats per minute, it would represent the starting point on the graph. As time progresses, minute, by minute, the heart will slow in the number of beats per minute. Each one of these could be plotted on a graph. This time is known as the recovery time for the heart. The recovery rate is an indication of the level of fitness for the person doing the exercise. Athletes tend to recover much faster than nonathletes, primarily because they have conditioned their bodies to such strenuous physical demands. Ultimately, after 15 to 20 minutes have elapsed, the heart will have returned to what is called it's resting heart rate, which would represent the bottom numbers on the graph. A quantitative graph of this data should correctly show an indirect relationship between the number of heartbeats per minute and the time elapsed after exercise.
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