lthrmodule

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Module designed for the calculation of cardiac parameters and to have the minimum of dependencies with other modules and to be as fast and light as possible.

Function	Parameters	Return
TheoricalMaxHeartRate	age: Number gender: {'m', 'f'}	Number
LTHRZones	age: Number gender: {'m', 'f'} sport: {'c', 'r'}	Object: {"zone1": Number,"zone2": Number,"zone3": Number,"zone4": Number,"zone5": Number}
HeartRateExtractor	file: FIT file	Array: ['Number', 'Number', 'Number', 'Number', 'Number', 'Number']
SpeedExtractor	file: FIT file	Array: ['Number', 'Number', 'Number', 'Number', 'Number', 'Number']
LTHRZone	age: Number gender: {'m', 'f'} heartRate: Number sport: {'c', 'r'}	String: {zone1, zone2, zone3, zone4, zone5}
LTHRZonesPercentage	age: Number gender: {'m', 'f'} sport: {'c', 'r'} arr: Array of Numbers from HeartRateExtractor function	Object: { z1: Percentage, z2: Percentage, z3: Percentage, z4: Percentage, z5: Percentage }

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Instalation

• NPM: npm i lthrmodule
• Yarn: yarn add lthrmodule
• PNPM: pnpm add lthrmodule

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How to Use

• TheoricalMaxHeartRate: Returns a number that is the person's maximum theoretical number of beats per minute

const { TheoricalMaxHeartRate } = require('lthrmodule')
console.log(TheoricalMaxHeartRate(23, 'm'))
// Should return 197

• LTHRZones: Returns a JSON object with the upper bounds heart zones for the user characteristics.

const { LTHRZones } = require('lthrmodule')
console.log(LTHRZones(23, 'm'))

• HeartRateExtractor: Returns an array of numbers with the heart rate for each iteration of time.

const fs = require('fs')
const { HeartRateExtractor } = require('lthrmodule')
const data = fs.readFileSync('./file.fit', 'UTF-8');
console.log(HeartRateExtractor(data))
// Should return a JSON array of numbers 

• SpeedExtractor: Returns an array of numbers with the speed for each time iteration.

const fs = require('fs')
const { SpeedExtractor } = require('lthrmodule')
const data = fs.readFileSync('./file.fit', 'UTF-8');
console.log(SpeedExtractor(data))
// Should return a JSON array of numbers 

• LTHRZone: Returns a string with the heart zone in which the person is located for the given data.

const { LTHRZone } = require('lthrmodule')
console.log(LTHRZone(23, 'm', 184))
// Should return zone4

• LTHRZonesPercentage: Returns a JSON object with the heart zones and the percentage of time the user has been in.

const fs = require('fs')
const { LTHRZonesPercentage, HeartRateExtractor } = require('lthrmodule')
const data = fs.readFileSync('./file.fit', 'UTF-8')
console.log(LTHRZonesPercentage(23, 'm', HeartRateExtractor(data)))

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At this time the only devices compatible are Decathlon HR Dual Band and systems that use the same data names.

And only cycling and running are available as sports.