A lot of the movement in the vertebrae that are rodded would occur in the section that is not rodded and would increase the risk for fracture if you have low bone mass.
Intshukumo eninzi ekumathambo anentsimbi yenzeka kule ndawo engenantsimbi yaye inyusa umngcipheko wokwaphuka xa unobunzima bamathambo obuncinane.