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calories: use better formula for calculation #1090

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opened this Issue Aug 20, 2014 · 3 comments

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mipapo commented Aug 20, 2014

 Reported by laufhannes on 26 Feb 44617255 01:21 UTC Bercksichtigt bisher nur den fixen Wert "kcal/h" je Sportart. Zumindest fr's Laufen wre eine genauere Berechnung nach Tempo/Herzfrequenz und Gewicht sinnvoll. Migrated-From: http://trac.runalyze.de/cgi-bin/trac.fcgi/ticket/1843

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laufhannes commented Sep 12, 2015 • edited

 ``````Men: kcal= [min] * (-55.0969 + 0.6309 x [bpm] - 0.1988 x [kg] + 0.2017 x [age]) / 4.184 Women: kcal = [min] * (-20.4022 + 0.4472 x [bpm] – 0.1263 x [kg] + 0.074 x [age]) / 4.184 `````` see e.g. http://fitnowtraining.com/2012/01/formula-for-calories-burned/ (weight in [lbs] there!)

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laufhannes commented Sep 17, 2015

 Remember to not change the value if it comes from the device and the user does only change the sport type (and keep the kcal/h from the device if the user changes duration).

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laufhannes commented Aug 18, 2016 • edited

 Further references: the original paper: http://www.braydenwm.com/cal_vs_hr_ref_paper.pdf, page 11 some other formulas: http://fitness.stackexchange.com/a/23747 The original paper has a `+` for the weight term for men and a `-` for women. There are other sources quoting this paper with both versions, so I'm unsure which is the right version to use. Verification is required if we want to use that formula. Just some more formulas:

laufhannes added a commit that referenced this issue May 4, 2017

``` prepare better energy expenditure calculation ```
`See #1090.`
``` 379b036 ```

mipapo added a commit that referenced this issue May 15, 2017

``` prepare better energy expenditure calculation ```
`See #1090.`
``` 1e89ef6 ```