Hey there CrumpinC... it is a good point about the osteo, although it is my understanding that it tends to be "elite" cyclists who are most at risk of bone deterioration because they spend most of almost every day on a bike and do little or no weight bearing exercise.

For the 'average' rider out there, well, most of us still run to catch buses, walk our dogs, chase our kids in the park, charge up stairs at the office... even without realising it we are doing weight-bearing exercise.

So yes, be aware of the risk, and particular, ladies over 35 where storing calcium becomes less efficient. But for most of here at TE (I acknowledge not all here are women hi MrS), the osteo risk will be the "normal" side effect of being a woman (hormones, reduced dairy intake because of crazy dieting, tend to be less physical they were younger than "average men" when etc etc).

So as CrumpinC says, increase the dairy in your life, and be aware (but I say don't stress unless cycling is just about all you do... sigh... I wish it was about all I did!)