Total bone mineral density (BMD, g/cm2) comparison of USMC BB group with weight lifters
| Group | Mean±SD | Age group | |
| USMC BB (n=9) | 1.55±0.10 | 25±2.1 | |
| Lifters (n=40) | 1.36±0.19 | 33.2±10.7 | |
| Lifter control (n=52) | 1.24±0.09 | 32.5±9.0 | |
| Active lifters (n=21) | 1.38±0.25 | 26.0±8.7 | |
| Active lifter control group (n=37) | 1.26±0.09 | 27.8±4.7 |
Data from Karlsson et al17 represent BMD for weight lifters and age-matched control groups.
BB, body bearers; USMC, US Marine Corps.