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TRIMP<sup>exp</sup> = sum(D x HR<sub>r</sub> x 0.64e<sup>y</sup>)
Where
* D is the duration in minutes at a particular [[Heart Rate]]
* HR<sub>r</sub> is the [[Heart Rate Reserve]]
* y is the HR<sub>r</sub> multiplied by 1.92 for men and 1.67 for women. These constants were developed based on the experimentally observed relationship between heart rate and lactate level.
