Lean Body Mass

Aka: Lean Body Mass, Lean Body Weight

1. See Also
   1. Ideal Weight
   2. Weight Measurement in Children
   3. Body Mass Index
2. Definitions
   1. Lean Body Mass
      1. Total body weight minus body fat
3. Indications
   1. Medication dose calculations
   2. Total Sodium Deficit (Hyponatremia)
4. Calculation: Male
   1. Lean Body Mass (Boer formula, 1984)
      1. Lean Body Mass (kg) = (0.407 * wtKg) + (0.267 * htCm) - 19.2
   2. Lean Body Mass (Hume formula, 1966)
      1. Lean Body Mass (kg) = (0.32810 * wtKg) + (0.33929 * htCm) - 29.5336
   3. Lean Body Mass (James formula, least accurate but commonly used)
      1. Lean Body Mass (kg) = (1.1 * wtKg) - 128 * (wtKg/htCm)^2
5. Calculation: Female
   1. Lean Body Mass (Boer formula)
      1. Lean Body Mass (kg) = (0.252 * wtKg) + (0.473 * htCm) - 48.3
   2. Lean Body Mass (Hume formula, 1966)
      1. Lean Body Mass (kg) = (0.29569 * wtKg) + (0.41813 * htCm) - 43.2933
   3. Lean Body Mass (James formula, least accurate but commonly used)
      1. Lean Body Mass (kg) = (1.07 * wtKg) - 148 * (wtKg/htCm)^2
6. Resources
   1. Fpnotebook Lean Body Mass Calculation
   2. Calculator.Net Lean Body Mass
      1. http://www.calculator.net/lean-body-mass-calculator.html
   3. Halls-MD Lean Body Mass
      1. http://halls.md/lean-body-weight-mass-explained/
   4. Richard Muirhead: Exploration of James Lean Body Mass - Time to Consider Others
      1. http://muirheads.co.uk/richard/RM_poster.pdf
7. References
   1. Boer (1984) Am J Physiol 247: F632-5 [PubMed]
   2. Hume (1966) J Clin Pathol 19(4):389-91. [PubMed]