| 1,25(OH)D | 1,25-dihydroxyvitamin D |
| 25(OH)D | 25-dihydroxyvitamin D |
| 1-OHase | 25-hydroxyvitamin D-1-hydroxylase |
| VDR | Vitamin D receptor |
| VDREs | Vitamin D response elements |
| ASM | Appendicular skeletal muscle mass |
| BMI | Body mass index |
| BIA | Bioimpedentiometry |
| HMB | Hydroxymethylbutyrate |
| FI | Frailty Index |
| SPPB | Short Physical Performance Battery |
| TUG | Get Up and Go Test |
| PF&S | Physical frailty and sarcopenia |
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