Metabolism Worksheet ALTERNATE ASSIGN #1_ Mayanelson
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School
Florida State College at Jacksonville *
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Course
2085C
Subject
Health Science
Date
Apr 3, 2024
Type
docx
Pages
6
Uploaded by CorporalPower2140
Name: Maya Nelson Spring 2024
N#: 01482137
Metabolism Lab Report
This is the worksheet you will submit for your Metabolism Lab Report. Follow along with the steps for each exercise shown in the Metabolism Lab ppt and in the Metabolism Handout. Do the calculations using information for the hypothetical individual below and enter the answers (and show your calculations!) on this worksheet. Make sure to show your work and to include
correct units for each answer in order to receive full credit!!!
Use the following information to complete your assignment:
Mary… 20-year-old FEMALE; weight: 150lbs.; height: 5ft 4in
Exercise 1: Calculate average BMR and Daily Caloric Needs
1. Calculate Mary’s BMR using the Harris-Benedict formula. ______________1,513 kcal/day________________________
BMR = 655.1 + (9.563 × 68.0389) + (1.850 × 162.56) - (4.676 ×20)
2. Activity multiplier… calculate Mary’s adjusted BMR based on activity level. Mary has a lightly active lifestyle so her activity multiplier is 1.375.
_______________2080.3 kcal/day________________________
1513 x 1.375
3. Calculate Mary’s BMR range (+/- 10% of adjusted BMR). *This calculation represents Mary’s estimated daily caloric needs.
________________________________________
Adjusted BMR range = 2080.3 kcal/day x 0.1 = 208.03 kcal/day
Low end of range = (2080.3 – 208.03) kcal/day = 1872.27 kcal/day
High end of range = (2080.3 + 208.03) kcal/day = 2288.33 kcal/day
BMR range =1872.27 – 2288.33 kcal/day
4
. Mary kept a Food Journal for 7 days. She calculated her Average Daily Caloric Intake based on her Food Journal. Her Average Daily Caloric Intake is 1650 kcal/day. Compare Mary’s Average Daily Caloric Intake to her BMR Range from question #3… Was Mary’s daily caloric intake above, below, OR within her BMR range?; What adjustments could she make to her diet and/or lifestyle to stay within her BMR range?
Mary’s was below her range. To improve it she could eat more snacks during the day and try eating something every morning to start her days off with nutrition. Also, just making sure she has at least 2 meals a day. Exercise 2: Determine max HR, VO
2
max, training HR, and Energy Usage
1. Determine Mary’s max HR by using the formula 220 - age. __________220-20 = 200 beats/min______________________________
2. Using the graph (O
2
Consumption vs. HR), determine O
2
consumption at Mary’s max HR.
_______________2.8 LO2/min__________________________
3. Convert Mary’s O
2
consumption at max HR to ml/min.
______________2800 mLO2/min___________________________
2.8 x 1000=2800
4. Determine Mary’s body weight in kg. ______________68.1kg___________________________
150/2.2= 68.18
5. Calculate Mary’s VO
2 max by dividing ml O
2
/min by body weight in kg.
_____________41.1____________________________
2800mLO2/68.1kg= 41.11
Now relate Mary’s O
2
usage at VO
2
max to kcals burned. How many calories is Mary burning when she is working out as hard as she possibly can (i.e. at her VO
2 max)?…
6. Calculate Mary’s kcal burned per minute at VO
2 max using equations in ppt.
_______________13.50 kcal/min__________________________
(4.825kcal/1LO2) x (1LO2/1000mLO2) x (41.1/(kg/min)) x 68.1kg = 13.50 kcal/min
---------------------------------------------------------------------------------------------------------------------
Most people don’t exercise at their VO
2
max, so let’s do the previous calculations again now using Mary’s training HR…
1. Determine Mary’s training HR using the formula max HR x .85 ___________170 beats/min______________________________
200 x 0..85= 170
2. Using the graph (O
2
Consumption vs HR), determine Mary’s O
2
consumption at her training HR.
__________2.4 O2/min_______________________________
3. Convert Mary’s O
2
consumption at training HR to ml/min.
____________2400LO2/min_____________________________
2.4 x 1000= 2400
4. Determine Mary’s body weight in kg. ____________68.1 kg_____________________________
150 x 2.2= 68.1
5. Calculate Mary’s VO
2
by dividing ml O
2
/min by body weight in kg.
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_____________35.2mLO2/kg/min____________________________
2400/68.1= 35.2 Now relate Mary’s O
2
usage at this VO
2
back to kcals burned. How many calories is Mary burning when she is working out at this VO
2 (i.e. at her training HR, a more realistic scenario)?...
6. Calculate Mary’s kcal burned per minute this VO
2
(i.e. her training HR) using equations in ppt.
_______________11.56kcal/min__________________________
(4.825kcal/1LO2) x (1LO2/1000mLO2) x (35.2/(kg/min)) x 68.1kg = 11.56
And now for the final (and quite eye opening) question…
7. ***Assuming no change in diet, how many minutes would Mary have to exercise per week in order to lose 1lb. (3500 kcal)?
_________________________________________
3500/ 11.56 = 302.76 min
302.76min / 60 = 5 hours, 46mins
8. Reflect on the answer to the above question using the following information… Mary has been
wanting to lose some weight for a while now, however she is so busy with work and school she doesn’t go to the gym as often as she would like. Most weeks Mary is only able to exercise about once per week for about an hour.
Based on the # of minutes Mary would have to exercise to lose 1lb. and her current exercise
routine, is she currently in a position to lose OR gain weight
?; If this is not her desired result, state how it could be adjusted to get the results she wants to achieve.
At the current rate she is going, she’s in the position to gain weight. Being that it isn’t her desired
result due to not having the extra time she could do at home exercises. She could purchase a small treadmill that she could use while she’s at home watching tv. Or she could increase how long she walks and the intensity of it. Exercise 3: Body Composition Analysis… Body Mass Index (BMI)
1. Calculate Mary’s BMI using the formula BMI = kg/(m)
2
____________25.7_____________________________
68.1kg / (1.6m) 2
2. Based on your calculation, which weight status category is Mary in? *get weight status category from table in ppt or handout
____________________overweight_____________________
3. Do you think that BMI is an accurate measure of a person’s body fat content? Explain your answer. *consider what it does/does not take into account… do a little research on this and provide a reference
No, because BMI is not a reliable indicator of body fat and should not be used as such. Rather of being used as a screening tool to identify prospective weight problems in people, BMI should be utilized as a metric to assess weight status in communities. BMI measures relative body weight rather than body composition. Based on BMI, many teenage athletes are mistakenly labeled as obese since lean mass weighs significantly more than fat. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3445161/#:~:text=Conclusions%3A,than
%20BMI%20in%20adolescent%20athletes
4. What are some other ways to measure a person’s body fat content? *include at least 2 alternate ways AND describe the technique for each; be specific… provide a reference
NOTE: my ppt/video cannot be used as a reference
1. The “Waist to Hip Ration” : This represents the relationship between hip and waist circumferences. More fat is accumulated around the waist or belly, giving the area a "apple shape," the greater the ratio. Compared to fat that is deposited somewhere else in the body (a "pear shape"), this form is more threatening to health. A tape measure and a basic calculation—
dividing the waist measurement by the hip measurement are all you need. Any units will do as the ratio is the only thing that matters. A waist-hip ratio of more than 0.90 for men and more than
0.85 for women is considered high risk. 2. Bio Impedance: This functions by passing little electrical impulses through the body and timing their return. This happens because the body's largely water-based tissues, including muscle and blood, allow current to flow through them more readily than through bone or fat.
https://www.bhf.org.uk/informationsupport/heart-matters-magazine/nutrition/weight/best-way-to-
measure-body-fat
Exercise 4: Hormonal Factors We are now going to consider the effects of hormones on metabolism and weight management. Consider the following case study: A 47-year-old woman presents to you with concerns about recent weight gain. She has not recently changed her diet or exercise plan. She tells you she has been sleeping more than normal but finds herself more exhausted than she used to. She also presents with dry skin, cold intolerance, and bradycardia.
1. What hormone imbalance would you suspect based on these symptoms? *Note: you may need to refer back to the Endocrine material from A&P 1 or do some of your own research on this.
Hypothyroidism, which is when the thyroid gland doesn’t produce enough hormones. These hormones are important for regulating metabolism and deficiency can lead to the symptoms described.
2. What tests could you perform to confirm your expectation in #1?
TSH(Thyroid Stimulating hormone Test) can be used to monitor thyroid function. Also a TPO ( thyroid peroxidase) test, which can help identify autoimmune thyroiditis, it’s a common cause of hypothyroidism.
3. What possible treatment options could you offer our female patient to address both her weight concerns and other physical ailments?
She could do hormone replacement therapy which would help restore her normal hormone
levels alleviating her symptoms such age weight gain and fatigue. FOOD JOURNAL
*You are exempt from this portion of the assignment.
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