1. Susannah is 23 years old. She weighs 140 pounds, is 4 foot 11 inches tall. He
ID: 227454 • Letter: 1
Question
1. Susannah is 23 years old. She weighs 140 pounds, is 4 foot 11 inches tall. Her body fat percentage is 26%. What is her BMI? What category does she fall into? Are there limitations to BMI? What are they?
2. As mentioned in Question 1, Susannah weighs 140 pounds. Her body fat percentage is 26%. She wants to be 21% body fat. What would her desired body mass be if she did achieve 21% body fat?
3. Susannah does not exercise and has a poor diet. She is willing to make some changes because she wants to lose some weight. She agrees to do the following: 1.) She will walk aerobically 4 times per week for a caloric expenditure of 350 calories per walk. 2.) She will do Zumba five days per week for 450 calories per session. 3.) She will eliminate her cookies and milk that she has every night. That accounts for 450 calories per night. Using information from your results from Question 1 and 2, how long will it take for Susannah to lose her weight?
Explanation / Answer
Answer 1: Her BMI is: 27.3 & she falls in category of Overweight
Explanation:
BMI = Body Mass Index (BMI) is calculated by - The body mass divided by the square of the body height. It is universally expressed in units of kg/m2, resulting from the mass in kilograms and height in meters. As per details above in the question, her weight in Kilogram would be 63.5kg. (1 pound = 0.453Kg). Her height in meter would be 1.524 meters (1 inch = 0.0254 meters)
Formula for BMI is weight in kg/ height in metre2 , for Susannah formula calculation would be: 63.5/(1.524)2
a) Her BMI is: 27.3
b) She falls in category of Overweight
As per WHO BMI Less than 18.5 is underweight, 18.5 to 25 Healthy or normal, 25.1 to 30 is overweight, 30.1 to 35 is called obese class 1 & more than 35 is obese class 2 and so on.
c) Yes, there are limitations-
Answer 2: 109 pounds approx
Explanation:
Body Fat: It is "adipose tissue." Adipose tissue serves a number of important functions. Its primary purpose is to store lipids from which the body creates energy. Having an excess of body fat leads to the condition of obesity, and that can be unhealthy. Some people are more genetically predisposed to excess body fat, and others build it up from lack of exercise and bad diets
The equation to determine goal weight is the following:
Goal Weight = Current Lean Body Mass / (1-Goal Body Fat percentage as a decimal).
Lean body mass = Body weight - total fat
By percentage as a decimal I mean this, if the goal is 10% body fat, that becomes 0.10. & 5% body fat becomes 0.05.
Total fat = 140/100x26=36.4 pounds. So lean body mass = 140-36.4=103.6 pounds
Now disired weight for Susannah is 103.6/1-0.05= 109 pounds approx
Answer 3: 112 days approx.
Explanation:
1.) Walk 4 x 350 = 1400 calories (200/day)
2.) Zumba 5 x 450 =2250 calories (321/day)
3.) Cookies and milk = 450/night
She will lose 200+321+450= 971 Calories/per day
3500 calories = 1 pound
For 31 pounds she has to lose 3500x31=108500
Days to lose 31 pound : 108500 / 971 = 112 days approx.
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