5280 contributor Ron S. Doyle has started a “little thing” called Twittercize, and “it’s starting to blow up,” he tells me (read more from Wireless Flash Inc. here). The free workout program, which has reaped nearly 200 followers in its first week, sends one-minute workout routines to people via Twitter (get into it here).

Doyle’s inspiration? He used to commute 30 miles a day via bicycle. Now, as a freelance writer whose commute is a mere 11 yards, he’s battling the bulge.