Heart rate reserve (HRR) is the difference between a person's measured or predicted maximum heart rate and resting heart rate. Some methods of measurement of exercise intensity measure percentage of heart rate reserve. Additionally, as a person increases their cardiovascular fitness, their HRrest will drop, thus the heart rate reserve will increase. Percentage of HRR is equivalent to percentage of VO2 reserve.
- HRR = HRmax − HRrest
This is often used to gauge exercise intensity (first used in 1957 by Karvonen).
Karvonen's study findings have been questioned, due to the following:
- The study did not use VO2 data to develop the equation.
- Only six subjects were used, and the correlation between the percentages of HRR and VO2 max was not statistically significant.
Read more about this topic: Heart Rate
Famous quotes containing the words heart, rate and/or reserve:
“People are less self-conscious in the intimacy of family life and during the anxiety of a great sorrow. The dazzling varnish of an extreme politeness is then less in evidence, and the true qualities of the heart regain their proper proportions.”
—Stendhal [Marie Henri Beyle] (1783–1842)
“At the rate science proceeds, rockets and missiles will one day seem like buffalo—slow, endangered grazers in the black pasture of outer space.”
—Bernard Cooper (b. 1936)
“Her face had the seamed reserve of the old in this country [Japan]. It was a neighborhood poignantly rich in old ladies.”
—Angela Carter (1940–1992)