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Body Composition . By Connie Rauser Sabino High School http://edweb.tusd.k12.az.us/crauser. BMR (basal metabolic rate). Amount of energy your body needs to function at rest. BMR Calculations. General Formula Your weight in lbs x 10 kcals/lb Harris-Benedict formula

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body composition

Body Composition

By

Connie Rauser

Sabino High School

http://edweb.tusd.k12.az.us/crauser

bmr basal metabolic rate
BMR (basal metabolic rate)
  • Amount of energy your body needs to function at rest

Body Composition

bmr calculations
BMR Calculations
  • General Formula
    • Your weight in lbs x 10 kcals/lb
  • Harris-Benedict formula
    • Adult male: 66 + (6.3 x B. W. in #) + 12.9 x Height in inches) – (6.8 x age)
    • Adult female: 655 + (4.3 x B. W. in #) + (4.7 x Height in inches) – (4.7 x age)

Body Composition

slide4
BMI
  • What is BMI?
    • Relationship of weight to height
    • Used to assess:
      • Underweight
      • overweight or risk for overweight
        • Above 95th percentile-overweight children
        • 25-29.9 –overweight adults
        • 30 and above-obese
      • Does not measure body fat

Body Composition

calculating bmi
Calculating BMI
  • BMI = W (kg) divided by H2 (meters)
    • BMI = W/H2
  • BMI = (W (lbs) x 705)/H (in)2
    • BMI = (W x 705)/H2

http://www.cdc.gov/nccdphp/dnpa/bmi/calc-bmi.htm

Body Composition

lean muscle mass vs body fat
Lean Muscle Mass vs. Body Fat
  • Lean body weight
    • Composed of muscle, tendons, bones, connective tissue
  • Percentage of body fat
    • Amount of fat tissue in body
      • Determines how much weight can be lost
        • Average college male = 12 – 15%
        • Average college female = 20 – 25

Body Composition

what does it look like
What does it look like?
  • 1# of body fat
  • Lean body mass

Body Composition

methods for calculating body fat 1
Methods for Calculating Body Fat#1
  • Skin fold calipers (skinfold thickness)
    • Measure the subcutaneous fat layer
    • Measure at least 3 sites
    • Error of skinfold is 3-3.5%
    • As high as 5%

Body Composition

method 2
Method #2
  • Bioelectrical impedance
    • Uses electrical conductivity to estimate fat-free mass
    • Muscle holds more water
    • Dehydration will cause high % reading
    • Error is similar to skin fold test

Body Composition

method 3
Method #3
  • Hydrostatic weighing (underwater)
    • “Gold Standard”
    • Underwater weighing with expiration of all air in lungs
    • Error of 2-2.5%

Body Composition

hydrostatic weighing
Hydrostatic weighing
  • 1- residual lung

volume established

  • 2-Athlete placed

on scale

  • 3-After exhaling all air,

athlete is submerged

for weighing

  • 4-Analysis and tests

are provided

Body Composition

skin fold method
Skin fold Method
  • Grasp dry skin between thumb and index finger
  • Hold the skin ½ inch above site
  • Caliper is held perpendicular to fold
  • Release grip on caliper
  • Dial is read to nearest 1 mm, 1-2 seconds after release
  • Minimum of 2 measurements, 1mm variance

Body Composition

sites for males females
Sites for Males & Females
  • Chest
    • Diagonal fold ½ the distance between the anterior axillary line (crease of underarm) and nipple
  • Subscapular
    • Diagonal fold 1-2 cm below the inferior angle of the scapula
  • Midaxillary (pectoral)
    • Vertical or horizontal fold midaxillary line at level of xiphoid process

Body Composition

sites for males females14
Sites for Males & Females
  • Suprailiac
    • Diagonal fold above the iliac crest at anterior axillary line
  • Abdomen
    • Vertical fold taken 1 inch to right side of umbilicus
  • Triceps
    • Vertical fold halfway between the acromion and olecranon processes on posterior midline

Body Composition

sites for males females15
Sites for Males & Females
  • Thigh
    • Vertical fold on anterior midline of thigh midway between proximal border of patella & inguinal crease
  • Biceps
    • Vertical fold on anterior aspect of arm over belly of muscle 1 cm above level used to mark triceps
  • Calf
    • Vertical fold at maximum circumference of calf on midline of medial border

Body Composition

body density calculations for males
Body Density Calculations for Males
  • Body Density = 1.1093800 – 0.0008267(sum of 3 skinfolds) + 0.0000016(sum of 3 skinfolds)2 – 0.0002574(Age)

(chest, abdomen, thigh)

  • Body Density = 1.1125025 – 0.0013125(sum of 3 skinfolds) + 0.0000055(sum of 3 skinfolds)2 – 0.0002440(Age)

(chest, triceps, subscapular)

Body Composition

body density calculations for females
Body Density Calculations for Females
  • Body Density = 1.0994921 – 0.0009929 (sum of 3 skinfolds) + 0.0000023(sum of 3 skinfolds)2 – 0.0001392(Age)

(triceps, suprailium, thigh)

Body Composition

body fat equations
Body Fat Equations
  • Brozek:
    • % Body fat = [(4.57/BD)-4.142] x 100
  • Siri:
    • % Body fat = [(4.95/BD) – 4.50] x 100
  • Females Only
    • Percent Body Fat (YMCA) = .41563(sum of 3 skinfolds) - .00112(sum of 3 skinfolds)2 + .03661(Age)

(triceps, abdomen, suprailium)

Body Composition

body fat calculations
Body fat calculations
  • Go the the following website
  • www.ExRx.net

Body Composition

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