Am I getting slower every day?

If you’ve ever been a bike commuter, you’ve probably asked yourself this question. Thanks to these little devices we can now attach to ourselves or our bicycles, we can now use our own actual ride data to investigate these kinds of questions, as well as questions like these:

• If I’m going to work from home one day a week, which day would maximize my recovery?
• Do I tend to ride faster in the morning or the evening?

Last year, I wrote a few posts about learning how to parse a set of Garmin XML data from 2013 and analyze it using pandas, matplotlib, and seaborn. This year I redid the same analyses, with a new installment of data from 2014.