I do a 5K walk everyday!
I do it on different routes and club the activity with doing errands and shopping.
I also make it a point to tell at least one stranger everyday to walk instead of using a personal vehicle, because not only will it improve their health but save some natural resources for all of us.
Some ideas to do a 5k everyday (and I guess many people may be doing it already):
1. Instead of taking a vehicle, walk to run an errand or do shopping, when destination is within 2K range.
2. If you commute to workplace: give up the personal vehicle; start early; walk to a public transport station at least 1 mile from your home and get down at least half a mile away from your workplace.
3. Make a rule for yourself not to use any vehicle for distances up to 2K, and beyond that use only public transport.
Finally, it’s great to see WordPress pushing this idea – can influence millions of people towards better health and saving nature.