article_snippet: (% of maximum predicted heart rate)
article_snippet: Maximum predicted heart rate is calculated as 220 – age.
article_snippet: Heart rate achieved during exercise should be divided by maximum predicted.
article_snippet: As well as age and gender, the formula factors in peak heart rate reached during intense exercise and the ability to tolerate physical exertion as measured by so-called metabolic equivalents, or METs .
article_snippet: As well as age and gender, the formula factors in peak heart rate reached during intense exercise and the ability to tolerate physical exertion as measured by so-called metabolic equivalents, or METs.
highlights_snippet: As well as age and gender, the formula factors in peak heart rate .
  