hey guys, you have to take Vitamin D too or the calcium doesn't get absorbed!
imagine, a kid outside on a sunny day will get 10,000 units of Vit. D. and the pill you are taking has how much? Yep, my dr said to up the calcium AND the vitamin D.
Buy chewable calciums and tablets too. Put them in your car, in your purse at your office and on your kitchen table. Take them.

My mother... has been on calcium (but until too late not enough)
fell from her Miata (low car) to the ground and broke 3 bones in her pelvis last year.
Broke her ankle 10 years ago (this is when the problem was discovered) and it still isn't right..

take your calcium. This is no joke. our life style does NOT work without taking calcium. And being a bicyclist makes it worse.