Skeletal Muscle Mass Index (SMMI): Females, Age 55-59
What these numbers mean
A value around 6.78 kg/m² is typical (50th percentile) for females in this age group. Scores above about 7.29 kg/m² fall near the 75th percentile or higher, indicating above-average performance. Scores below about 6.37 kg/m² fall near the 25th percentile; about 75% of the reference population scored higher.
Also see: 50-54 · 60-64 · All ages
Data source: Lee et al. (UK Biobank SMMI) About this study
Skeletal Muscle Mass Index (SMMI) Body Composition Females 55-59
skeletal muscle mass index SMMI skeletal muscle index SMI appendicular skeletal muscle mass ASMM sarcopenia muscle mass UK Biobank BIA norms normative data normative values reference values percentiles benchmarks reference ranges standards Skeletal Muscle Mass Index (SMMI) Percentile Chart (kg/m²)
Poor 5.68 kg/m²
Below average 6.37 kg/m²
Average 6.78 kg/m²
Above average 7.29 kg/m²
Excellent 8.94 kg/m²
This percentile chart shows how common a value is, not whether it is healthy.