Skip navigation

Karvonen formula (Heart Rate Reserve)

This formula uses maximum and resting heart rate with the desired training intensity to get the target heart rate.

Training heart rate ═ (max pulse – resting pulse) x power% - a + resting pulse

Maximum heart rate: (220 – age) ═ 220 – 40 ═ 180

Deduct resting heart rate from maximum heart rate ═ 180 -80 ═ 100

Multiply the given value with the desired intensity (50%) of force/power, 100 x 0, 5 ═ 50

Resting heart rate should be added to the given value: 50+ 80 ═ 130 beat/minute

In PE classes and recreation professionals should be careful so that intensity will not reach the level of causing pain. Values are acceptable a little above 50% level.