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Overview :
Patients exercising at the correct intensity should have a
heart rate within a given target range.
maximum heart rate for a given age =
= 220 - (age in years)
Method 1
lower limit for target heart rate =
= ((maximum heart rate for age) * (lower limit percentage
for age))
upper limit for target heart rate =
= ((maximum heart rate for age) * (upper limit percentage
for age))
where:
• In the
elderly, the lower limit percentage is 60% and the upper limit percentage is
75%.
Method 2: Heart Rate
Reserve (Karvonen) Formula
lower limit for target heart rate =
= (((maximum heart rate for age) - (resting heart rate)) *
0.60) + (resting heart rate) =
= (0.60 * (maximum heart rate for age)) + (0.40 * (resting
heart rate))
upper limit for target heart rate =
= (((maximum heart rate for age) - (resting heart rate)) *
0.75) + (resting heart rate) =
= (0.75 * (maximum heart rate for age)) + (0.25 * (resting
heart rate))
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