Biometrics Notes

Biometrics Assignment Breakdown

1. Basal Metabolic Rate (BMR) Calculation
  • Definition: BMR is the amount of energy (calories) required for basic cellular activity while at rest.
  • Formula: Weight in lb/2.2=Weight in Kg\text{Weight in lb} / 2.2 = \text{Weight in Kg}
    • Example: 192 lb / 2.2 = 87 kg
  • Daily BMR Calculation: BMR (in calories)=Weight in Kg×24\text{BMR (in calories)} = \text{Weight in Kg} \times 24
    • Example: 87 kg x 24 = 2,088 calories
2. Total Daily Caloric Needs
  • Activity Factor: To calculate total calories needed based on activity level.
  • Formula: Total Calories=BMR×Activity Factor\text{Total Calories} = \text{BMR} \times \text{Activity Factor}
    • When activity factor is 1.6 (moderate activity):
    • Example: 2,088 cals x 1.6 = 3,341 total calories.
3. Macronutrient Distribution
  • Calculate how many calories should be from carbohydrates, fats, and proteins based on total caloric needs.
  • Carbohydrates:
    3,341×0.50=1,670 calories from carbs3,341 \times 0.50 = 1,670 \text{ calories from carbs}
  • Fats:
    3,341×0.30=1,002.3 calories from fats3,341 \times 0.30 = 1,002.3 \text{ calories from fats}
  • Proteins:
    3,341×0.20=668.2 calories from proteins3,341 \times 0.20 = 668.2 \text{ calories from proteins}
4. Body Mass Index (BMI) Calculation
  • Formula: BMI=Weight in lbHeight in in2×703\text{BMI} = \frac{\text{Weight in lb}}{\text{Height in in}^2} \times 703
    • Where weight = 192 lb, height assumed from context as 69 inches.
    • Example:
      BMI=192692×703≈28.4\text{BMI} = \frac{192}{69^2} \times 703 \approx 28.4
  • Risks Associated with BMI:
    • High blood pressure
    • Type II diabetes
    • Stroke
    • Heart disease
    • Sleep apnea
    • Fertility issues
5. Waist-to-Hip Ratio Calculation
  • Measurements:
    • Waist: 36 in
    • Hips: 42 in
  • Formula: Waist-Hip Ratio=WaistHips\text{Waist-Hip Ratio} = \frac{\text{Waist}}{\text{Hips}}
    • Example: 36 in / 42 in = 0.86
  • Risk Assessment:
    • A ratio of 0.86 indicates low risk.
6. Estimated Energy Requirement (EER)
  • EER Calculation: EER=[662−(19.53×44)]+1.25×[(5.91×87)]+[(539.6×1.75)]EER = [662 - (19.53 \times 44)] + 1.25 \times [(5.91 \times 87)] + [(539.6 \times 1.75)]
    • Breakdown:
      • 662 - (19.53 * 44) = 419.3
      • 1.25 * (5.91 * 87) = 1,384.2
      • 539.6 * 1.75 = 944.3
      • Thus total: $\text{Total EER} = 419.3 + 1,384.2 + 944.3 = 3,153.3$
7. Percent Body Fat Calculation
  • Result: Body fat percentage is 15.9%, indicating a healthy range.