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Body.comp
Body.comp
Body.comp
Body.comp
Body.comp
Body.comp
Body.comp
Body.comp
Body.comp
Body.comp
Body.comp
Body.comp
Body.comp
Body.comp
Body.comp
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Body.comp

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Transcript

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

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