Years ago, I decided that I need to continually rethink how I commute, and introduce new challenges into it, otherwise I just get stuck in the same old routine, my legs get used to it, and I don't grow any new leg muscles. Then I started making changes: increasing the distance: my commute used to only be 5-8km each way, so I deliberately moved further away from work (I rent, so not too difficult to uproot), and increased the commute to 27km each way. increasing the climbing: once I got used to 27km each way, I found it lost its challenge, so I moved again, this time targetting a suburb in the foothills of the Dandenong Ranges east of Melbourne. Work is at 20m elevation, home is at 160m, and there are heaps of hills between the two (in either direction). eventually, even that lost its challenge, so earlier this year (partly because I needed to toughen up the legs a bit more for the European Alps), I introduced standing-up pedaling intervals to my commute, typically on some of the uphill bits, and practised these until I could increase the distance / time that I could remain standing before the legs said "enough". This has worked really well, and my legs are probably in the best shape they've ever been. What do you do to make the commute more challenging? I'd like to hear your ideas. Regards, --- Victor.