The five-level model: a new approach to organizing body-composition research.
Level 5 - mechanism / opinion, no new human data
Theoretical framework and expert conceptual model with no primary human data
PubMed 1609756 · doi:10.1093/ajcn/56.1.19
What was done
This paper proposes a conceptual framework organizing human body-composition research into five hierarchical levels of increasing complexity: Level I (atomic), Level II (molecular), Level III (cellular), Level IV (tissue-system), and Level V (whole body). It defines organizational rules, connections between compartments, and the concept of a body composition steady state.
What was found
The abstract reports no numerical findings or empirical data. It presents the theoretical five-level matrix for standardizing body-composition equations and identifying research gaps.
Why it matters
The model provides a foundational organizational architecture for human body composition research, linking biological compartments to measurement methods and mathematical models.
Limits
This is a theoretical and conceptual framework containing no empirical measurements, clinical data, experimental validation, or sample size.
Cited by
- context Oxygen, carbon, hydrogen, nitrogen, phosphorus, and calcium account for 96% of human body weight, and with electrolytes they make up 99%.