Out of touch! and Question for the group

Whooops! I let myself get negligent here, and my website postings dwindled. :-/ In addition, my biking slacked off a bit, too. . . guess the two are related. I find that it's much harder to get myself to post if I haven't done what I'm supposed to do!

I haven't gone on any hour-long bike rides in a few weeks. To compensate (somewhat), I rode my bike to the coffee shop a few times. The odometer kept track of my distance and mph . . . but I'm not home now, so that may have to wait until the next post. I was thinking about behavior change interventions and wondering whether there was a predictable time when most people stop doing the new thing (2 months? 4 weeks?) -- surely, it depends on how much a person wants to change and how difficult the change will be to implement. I *wanted* to ride my bike that often, but I found myself going back to my habitual forms of exercise -- jogging, dancing, yoga.

Did anyone else find that? I mean, did anyone else intend to do a specific health behavior (like biking) but compensate with another "healthy" behavior when you didn't meet your goal (jogging, etc.)?