Is Bicycling "Bad to the Bone"?

Michael Giberson

Research studying competitive cyclists suggests that cycling can reduce bone density.

... most recreational cyclists probably don’t need to worry too much about their bones. “The studies to date have looked primarily at racers,” [researcher Aaron] Smathers says. “That’s a very specialized demographic. These guys train for hours at a very high intensity. They sweat a lot. They never go for runs. They don’t usually do much weight-lifting,” to avoid adding bulk. “They’re strange.”

I never "train for hours at a very high intensity," so I'm probably safe.