Scuba diving does not affect bone mineral density or bone mineral content

Objectives: Scuba diving is a very specialized, physically demanding activity. The bones of divers are subjected to stress from water pressure, from the forces generated when their muscles resist water pressure, and from weightlessness. Notably, few studies have addressed the effects of diving on bone mineral density (BMD) and bone mineral content (BMC), and the results have been controversial. The goal of the study was to assess BMD and BMC in a group of professional scuba divers. Methods: The study group (diving group [D]) included 16 male professional scuba divers who also worked as firemen. The control group included 14 firemen who did not scuba dive (non-diving group [ND]). The groups were matched by age, weight, and height. The BMD and BMC of the whole skeleton, L1-L4, total hip, and femoral neck were assessed by dual-energy X-ray absorptiometry. Results: There were no differences in BMD or in BMC in the two groups, and the BMD and BMC values were within one standard deviation in terms of Z-and T-scores. There was no correlation between total diving time (hours) and BMD in the D group. Conclusion: Scuba diving does not negatively influence bone turnover. (C) 2011 Societe francaise de rhumatologie. Published by Elsevier Masson SAS. All rights reserved.