Artificial gravity protects bone and prevents bone marrow adipose tissue accumulation in humans during 60 d of bed rest
Authors' conclusion
Recreating an axial force vector mechanically on horizontalized participants prevented BMAT accumulation and demineralization.
Study context
- Population
- Participants bedridden for 60 d at 6° head down tilt (16 male, 8 female)16 male, 8 female
- Participants
- 24 participants
- Comparison
- Artificial gravity vs bedrest only
- Bedrest onlyn = 8reference
- Primary endpoint
- Lumbar vertebral BMAT accumulation (3T magnetic resonance (MR)) and bone loss (BMD by DXA)
- Follow-up
- 60 d of bedrest
Methodological details60 d bed rest at 6° head down tilt
- 60 d bed rest at 6° head down tilt
Primary result
As reported in the abstract
Vertebral BMAT change
Bedrest only
+3.93%
CI −0.28–8.14
Further findings
| Outcome | Bedrest only | cAG | iAG | X2(2) | P value |
|---|---|---|---|---|---|
| BMAT change in males · 60 d of bedrestBetween Bedrest only and cAG, iAG · difference between interventions | 5.81% (CI 2.01–9.61) | −1.35% (CI −5.74–3.04) | 1.23% (CI −1.53–3.99) | 8.487 | P = 0.014 |
| BMD change in males · 60 d of bedrest | −0.02 (CI −0.05–0.00) g/cm² | — not stated in the abstract | 0.00 (CI −0.04–0.05) g/cm² |
— not stated in the abstract
Bone marrow adipose tissue (BMAT) vs BMD correlation
- Modulation of BMAT inversely correlated with BMD at the same vertebrae
Original publication
Artificial gravity protects bone and prevents bone marrow adipose tissue accumulation in humans during 60 d of bed rest. J Bone Miner Res. Published 28 August 2025. doi:10.
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