Originally Posted by Velocirapture

So this is not technically from the web (well, the raw data is: http://www.cyclingmasters.com/site/results ), but it occurred to me that it might be interesting for others.

This is a simple comparison of race time changes across age and gender groups (very simple - done in excel as an 'i wonder..' exercise). The avg and stdev are based on predominantly 2012 and 2013 World Masters results, top ten places per event, and the age on the x-axis refers to the starting age of the particular age range.
NB - 2000m pursuit times for age groups that do longer distances, are based on the 2000m split for the longer distance. Likewise for the 500m times - this is just the split for the kilo or 750m as relevant.
Horizontal error bars are an artefact - ignore. the vertical error bars are based on the data sets.