Article from 1999, referenced study likely from earlier.
The average American walks less than 75 miles a year - about 1.4 miles a week, barely 350 yards a day.
Thank you to @urlyman@mastodon.social for pointing this out.
Archive link: https://web.archive.org/web/20240218142310/https://www.independent.co.uk/arts-entertainment/bryson-s-america-why-would-you-walk-1079183.html
Not the mentioned study, but still interesting.
https://journals.lww.com/acsm-msse/fulltext/2010/10000/pedometer_measured_physical_activity_and_health.4.aspx
Important to note that study participants may not be reflective of the average American.
Edit: 1 miles is apparently near 2,000 steps. (From another article which credited "researchers".)