Code is deposited in GitHub, see manuscript section “Code availability” for DOI.
Sample size was determined by available data during period Jul 2015 
to Dec 2018 provided by Polar. This size is by far sufficient, as indicated by
                                         smooth distribution functions.  
Data exclusion criteria were pre-established. Data exclusion was applied to all available data from Polar Flow website.   
Blinding was not relevant as this is not a clinical research study and differential assessment or treatment cannot occur since
individuals uploaded their data to webservice before our study started, without knowing about our analysis.  We did not use any 
personal information of individual besides their sex. All individuals and their activities were linked only by an anonymous ID. 

Human running performance from real-world big data.
Emig, Thorsten,Peltonen, Jussi