Many foods are fortified with calcium, like soy milk. You can reach the recommended daily intake quite easily. Just be sure to have adequate Vitamin D levels and Vitamin K to make sure the calcium actually goes to the bones instead of the arteries.

Calcium intake should be regulated though to not increase kidney stone risk. Also the bones of obese or muscular people are under heavier loads and so are stronger by default. It's the frail folks who are at greatest risks.