Lean Mass Index (LMI): Age Trend
LMI rises slightly through young adulthood, peaks around age 45 to 54 (~20.2 kg/m² for men, ~16.4 kg/m² for women), then gradually declines with age in both sexes.
Data source: Kelly et al. (NHANES DXA) About this study
Lean Mass Index (LMI) Body Composition Trend
lean mass index LMI lean body mass LBM lean muscle mass skeletal muscle NHANES DXA body composition trend aging norms percentiles reference ranges
Lean Mass Index (LMI) by Age (kg/m²)
Lean Mass Index (LMI) Median Values
| Age | Male (kg/m²) | Female (kg/m²) |
|---|---|---|
| 22 | 18.98 | 15.6 |
| 27 | 19.31 | 15.83 |
| 32 | 19.6 | 16.03 |
| 37 | 19.85 | 16.19 |
| 42 | 20.04 | 16.3 |
| 47 | 20.15 | 16.36 |
| 52 | 20.15 | 16.35 |
| 57 | 20.07 | 16.3 |
| 62 | 19.91 | 16.21 |
| 67 | 19.67 | 16.08 |
| 72 | 19.36 | 15.92 |
| 77 | 18.98 | 15.73 |
| 82 | 18.58 | 15.53 |
| 87 | 18.16 | 15.32 |