vol

Interesting point. I wonder against whom did the studies compare the cyclists. Were they comparing cyclists with other athletes, or with people not much into sports? In other words, is that cycling just does not help strengthening the bone as some other sports do, or it decreases bone density so that cyclists are worse off than couch potatoes?

I wonder if part of the culprit has to do with the fact that people who frequently ride bicycles tend to walk less. I used to walk a lot until taking up bike riding. Now to go anywhere more than 10 blocks away (half mile?), I go by bike.

Regarding the low weight-bearing nature of cycling, what about the wrists? I ride hybrid with flat bar and I feel my wrists are supporting considerable weight during a long ride (very sore). However when I had a bone density scan of my wrists, the result was below normal bone density.