Body.comp

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Body.comp

  1. 1. Body Composition KINS 410
  2. 2. Introduction <ul><li>Importance – Body composition is related to: </li></ul><ul><ul><li>Performance </li></ul></ul><ul><ul><li>Health </li></ul></ul><ul><ul><ul><li>Obesity </li></ul></ul></ul><ul><ul><ul><li>Anorexia nervosa or bulimia </li></ul></ul></ul><ul><ul><li>Body composition vs. body size </li></ul></ul><ul><ul><li>Social stigma </li></ul></ul><ul><li>Not all bad </li></ul><ul><ul><li>Energy storage </li></ul></ul><ul><ul><li>Stores fat soluble vitamins </li></ul></ul><ul><li>Two Forms of fat </li></ul><ul><ul><li>Essential </li></ul></ul><ul><ul><li>Storage (non-essential) </li></ul></ul><ul><ul><ul><li>Subcutaneous </li></ul></ul></ul><ul><ul><ul><li>Visceral fate </li></ul></ul></ul>
  3. 3. <ul><li>Behnke 2-component model </li></ul><ul><li>2-component model </li></ul><ul><ul><li>Mass = fat free mass (FFM) + fat mass (FM - % fat) </li></ul></ul><ul><ul><ul><li>FFM (Fat Free Weight – FFW) </li></ul></ul></ul><ul><ul><ul><ul><li>20% - skeletal </li></ul></ul></ul></ul><ul><ul><ul><ul><li>45% - muscle </li></ul></ul></ul></ul><ul><ul><ul><ul><li>35% - brain, skin, blood, organs </li></ul></ul></ul></ul>Body Composition Different Models
  4. 4. Assessing Body Composition <ul><li>No direct measures </li></ul><ul><li>Field vs. Laboratory techniques </li></ul>
  5. 5. Laboratory Techniques Cadavers
  6. 6. Laboratory Techniques Radiography, X-ray, CT scan
  7. 7. Laboratory Techniques Magnetic Resonance Imaging (MRI )
  8. 8. Laboratory Techniques Total body electrical conductivity (TOBEC )
  9. 9. Laboratory Techniques Dual-energy x-ray absorptiometry
  10. 10. Laboratory Techniques Bod Pod
  11. 11. Laboratory Techniques Hydrostatic (Underwater) Weighing - Hydrodensitomertry
  12. 12. Laboratory Techniques Hydrostatic (Underwater) Weighing - Hydrodensitomertry
  13. 13. Laboratory Techniques Hydrostatic (Underwater) Weighing - Hydrodensitomertry <ul><li>The weight of the water is converted to volume by dividing </li></ul><ul><li>its density (g  ml -1 ) which is affected by temperature </li></ul><ul><li>Db = Wta / [ (Wta – Wtw) / Dw ] </li></ul><ul><ul><li>Dw = water density ======> </li></ul></ul><ul><li>Further modifications </li></ul><ul><ul><li>RV </li></ul></ul><ul><ul><li>Intestinal gases ~ 100 ml </li></ul></ul><ul><ul><li>Density of water </li></ul></ul>
  14. 14. Laboratory Techniques Hydrostatic (Underwater) Weighing - Hydrodensitomertry <ul><li>Db = Wta / ((Wta – Wtw) / DW)) – (RV + V GI ) </li></ul><ul><ul><li>mass must be in g (kg) </li></ul></ul><ul><ul><li>volumes must be in ml (liters) </li></ul></ul><ul><li>Db => relative fat (% fat) </li></ul><ul><ul><li>Weakness of densitometry </li></ul></ul><ul><ul><li>Must be population specific </li></ul></ul><ul><ul><li>Siri equation most </li></ul></ul><ul><li>UWW Procedures </li></ul><ul><ul><li>Equipment </li></ul></ul><ul><ul><li>Subject preparation </li></ul></ul><ul><ul><li>Basic procedures </li></ul></ul><ul><li>UWW Accuracy </li></ul><ul><ul><li>Validity </li></ul></ul><ul><ul><li>Reliability </li></ul></ul>
  15. 15. % Body Fat Equations Db to % Fat
  16. 16. Field Techniques Skinfolds
  17. 17. Field Techniques Bioelectrical Impedance
  18. 18. Field Techniques Infrared Interactance (Futrex)
  19. 19. Calculation of Ideal Body Weight <ul><li>Procedure </li></ul><ul><ul><li>Determine percent body fat (% body fat) </li></ul></ul><ul><ul><li>Calculate resent fat free weight (FFW) </li></ul></ul><ul><ul><li>Determine ideal % body fat and % FFW </li></ul></ul><ul><ul><li>Determine ideal body weight by dividing present FFW by </li></ul></ul><ul><ul><li>ideal % FFW </li></ul></ul>
  20. 20. Calculation of Ideal Body Weight <ul><li>Example </li></ul><ul><ul><li>Subject: Male, age 30 </li></ul></ul><ul><ul><li>Body Weight: 190 lbs </li></ul></ul><ul><ul><li>% Body Fat: 20 </li></ul></ul><ul><ul><li>Desirable body fat: 15 </li></ul></ul><ul><ul><li>Present FFW: 152 </li></ul></ul><ul><ul><li>1.) 20% </li></ul></ul><ul><ul><li>2.) 190  0.20 = 38 FW </li></ul></ul><ul><ul><li>190 – 38 = 152 present FFW </li></ul></ul><ul><ul><li>3.) ideal % fat = 15% : ideal FFW = 85% </li></ul></ul><ul><ul><li>4.) 152 / 0.85 = 179 </li></ul></ul><ul><ul><li>5.) Conclusion: must lose 11 lbs of fat </li></ul></ul><ul><ul><li>6.) Emphasizes importance of FFW </li></ul></ul>
  21. 21. Next Up Final

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