This piece seems to apply mainly to adolescent boys.
My husband loaded trucks at a lumber yard for three years in his teens. Sports too, of course, but he is sure that that labor made him a sturdier adult. Hard manual labor is what growing boys are made for. This might not apply to women, though.
In adulthood, however, if women want to avoid osteopenia the simplest and most natural approach is to lift heavy. Cardio does nothing for bone maintenance.