Question

Exercise: Anthropometrics Assessment

Instructions: Complete the following measurements with your partner.

1. Calculate the BMI of a female who is 66 inches (5 foot 6 inches) and 170 lb. What is the BMI classification? (BMI = weight in kg/height in meters squared (m²); weight in kg = weight in lb./2.2; height in meters = height in inches x 2.54 cm; height in meters = height in cm/100). *Remember to square the meters value in the denominator.

Example: Height = 60 inches (5 ft 1) and 110 lb.

Weight in kg = 110/2.2 = 50 kg; Height (m²) = 60 inches x 2.54 = 152.4 = 152.4/100 = 1.524 meters = 2.32 m²; BMI = 50 kg/2.32 = 21.5 (Classification: normal)

2. Calculate the waist-to-hip and waist-to-height ratios of this female with a waist circumference of 30 inches and hip circumference of 35 inches. How well do both calculations compare?

3. Explain whether her health risk status based on BMI standards aligns with her risk status based on waist/hip and waist/height ratios.

4. What are the procedures, advantages and disadvantages of four methods for body composition assessment?

5. Calculate her estimated energy needs using an appropriate formula from the Body Composition handout.

6. View the posted video “Korr: Indirect Calorimetry and Energy Expenditure” at https://www.youtube.com/watch?v=zUrkHqgeiyg. How do these results compare to what your needs might be based on the gold standard (indirect calorimetry)?

Answer 1

BMI CALCULATION

Height = 66 inches

Weight = 170 lb

we need to convert inches to cm & lb to Kg. So;

Height in cm = 66 × 2.54

​​​​​ Height in cm = 167.64 cm

Height in metre square = 167.6 × 167.6

= 2.8 m2

Weight in Kg = 170 ÷ 2.2

Weight in Kg = 77.27 Kg

the standard forma to calculate BMI is;

WEIGHT in Kg/HEIGHT in metre square.

ie,

BMI = 77.27/2.8

BMI = 27.59 Kg/m2

her BMI is not normal. She is obese. (Normal BMI range is 18.5-24.9, 25-29.9 is considered as overweight, 30 & above is obese)

here the female is OVERWEIGHT.

WAIST TO HIP RATIO

Waist circumference = 30 inches

= 30×2.54

​​​​Waist circumference = 76.2cm

Hip circmcircumfe = 35 inches

= 35×2.54

Hip circumference = 88.9cm

WAIST to HIP Ratio = waist measurement/hip measurement

= 76.2cm/88.9cm

WAIST to HIP Ratio = 0.85

WAIST to HEIGHT RATIO

Waist circumference = 30inches = 76.2cm

Height = 66inches = 167.6cm

WAIST to HEIGHT RATIO = waist measurement/height measurement

= 76.2cm/167.6cm

WAIST to HEIGHT RATIO = 0.45

NORMAL WAIST TO HIP RATIO IS 0.85 OR LESS IN WOMEN.

Hence female's waist to hip ratio is normal

NORMAL WAIST TO HEIGHT RATIO IS 0.42-0.48

Hence female's waist to height ratio is normal.

Hence the female's BMI is high and she is overweight, she is at risk for increased blood pressure, diabetes, cardiovascular diseases, musculoskeletal problems.