matsalo
Runalyzer
Posts: 33
Joined: Mon 4. Jun 2018, 11:30

Marathon shape variables/parameters

Wed 13. Jun 2018, 15:02

Hi,

Just a quick question in order to understand the marathon shape function. As I understand it, it has a goal of 70km/week in general and 28km/week for long runs, and the user controlled parameters in settings controls the time span to evaluate at and the definition length of a long run.

Therefor I wondered if these values for weekly goals also could be tweaked with, or are these static and locked parameters?

Don't know how senseable it is to tweak with them, but the reason to ask was more of curiosity to understand the function.
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laufhannes
Core developer
Posts: 708
Joined: Mon 29. Jul 2013, 20:59

Re: Marathon shape variables/parameters

Wed 13. Jun 2018, 15:20

They depend on the optimal marathon prognosis (based on the current athlete's vo2max shape) and are derived roughly from common marathon training plans.

The exact calculus:
weekly mileage = pow(EffectiveVO2max, 1.135)
long run = log(EffectiveVO2max / 4.0) * 12.0

log is the natural logarithm here
This results in the following (vo2max / mileage / long run):
30: 47 km / 24 km
40: 66 km / 28 km
50: 85 km / 30 km
60: 104 km / 32 km
70: 124 km / 34 km

This is not adjustable by the user so far.
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matsalo
Runalyzer
Posts: 33
Joined: Mon 4. Jun 2018, 11:30

Re: Marathon shape variables/parameters

Wed 13. Jun 2018, 17:19

Thanks for your detailed answer :)

It makes perfectly sense to keep it the way it is.
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