Calcium is laid on by stressing bones to the limit. Usually it takes strength training. That 2x per week,on graduated( and must be graduated or doesnt work after a while) course will do the trick. Cyclists most likely gain some from strain put on femurs, tibia, hips etc but very little for axial spine, arms, back etc. I do supplements, and calcium too but according to textbooks for fitness cert 3( as compiled by Aus Institute of Sport and USA Sports College( forget name, is very big)
8 to 10 times, 60 % of rep max( the most you can do in one rep), 2-6 reps, 2- 3 times a week.
Thats for regular health. Prevents oesteo, hip fracture, general aging nastys.
Conquering illness, one step at time.