Training Impulse (trimp) based on heart rate, which often referred as TRIMP^exp
npm install trimp``javascript``
var Trimp = require('trimp')({sex: 'male', rest: 55, max: 194});
var hr = 135; // workout perfomed at this heart rate
var duration = 60; // minutes
var trimp = Trimp.calcuate(hr, duration);
console.log("Total TRIMP for this workout is: " + trimp);