I been a runner and cycling for 42 years. Started keep a running log daily in 1985. Wrote it on a little calendar. To this day I still have a written log I write in each day running and/or cycling. Sure I have Strava and Garmin and even Ride with the PGS but the real log that counts is the written one for stats and totals. It is just bit comforting to write it down but I don't why.