It is how much bad, when vertebra or vertebrae (for example crack, at vise on perekladi...

[Sergey]

It is how much bad, when vertebra or vertebrae (for example crack, at vise on a crossbeam or pulling up)? Whether Speaks it about a disadvantage of a calcium (or still what bjaka) in bones?

[Panteleimon]

Sound phenomena (a crash, clicks) arise in intervertebral joints. The same mechanism, that at pohrustyvaniii kostjashkami fingers. Bjaka here not in a calcium, and in the raised or increased mobility of joints that is sometimes observed at a underdevelopment of muscles or instability of the copular apparatus.