I've been hearing for several years about competitive cyclists whose non-load-bearing exercise can reduce bone density. So I took a test, and sure enough, I have a slight Osteopenia. Has anyone else looked into this?

It helps to do load-bearing exercise too, but... well... I really don't like weight lifting or going to a gym. Running used to be fun, but with these old knees it's not a good idea any more. Hiking downhill is also good (oops, knees again!) but still doable. Do I need some cheese with this whine?

Most of us as we age having thinning bone density.  Slight osteopenia isn't much to worry about thankfully!  Osteoporosis though can be worrying depending on how bad it is, and typically affects far more women than men.  Lani Simpson has an excellent book on this subject.  And there are other books that will take you through the wonderful world of osteoclasts and osteoblasts.  

Weight bearing exercise of course (and gentle impact exercise), calcium rich foods and possibly supplements can help (plant-based calcium is said to be better absorbed).  But ALSO magnesium and vitamin d to help absorb and other micronutrients come into play.   Medication is an option if it's very serious. 

If your bone density is really a problem, fall prevention is a priority.  

Good luck to everyone dealing this this issue!  I say read and learn as much as you can.  

Dan's comment reminds me that Becky, who loves to walk, often wears a weighted vest when she goes out. The vest, worn under a coat or whatever, has little pockets all over in which weights are placed.