Measure your Metabolic Rate | Resting Metabolism Test
Resting Energy Expenditure "REE"
What is the most Accurate test to measure Metabolism
a Resting Energy Expendture (REE)Test.
What does REE mean?
Resting energy expenditure represents the amount of calories required
for a 24-hour period by the body during a non-active period. Energy Expenditure or your Basil Metabolic Rate is important when it comes to losing weight and getting in great shape. We Measure your Resting Metabolism or your Resting Energy Expenditure with one of the most accurate methods to figure out how many calories you burn with in a 24-hr period. So if you want to know exacly how many calories your body really burns durring the day and how many calories you bodies metabolism needs then we can do that with indirect calorimeter. This is done with a metabolic cart where we measure the excahnge by
analysis of respired gases (usually expired) to derive volume of air passing through the lungs, the amount of oxygen extracted from it (i.e., oxygen uptake VO2) and the amount of carbon dioxide, as a by-product of metabolism, expelled to atmosphere (CO2 output ? VCO2)
With These measurements we may find out additiona data that will allow us to measure your bodies resting metabolism so we can determin exactly how many calories you need and how we need to adjust your metabolism so you can get results. Stop trying to figure things out on your own by guessing how many calories your metabolism burns during the day find out accurtly today.
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Benefits of using a Resting Metabolic Test or REE in the clinical setting
The REE is useful to prevent under and overfeeding of individuals,
especially in the acute care hospital setting. Excessive calories or inadequate feeding regimens can have detrimental effects on clinical outcomes of patients' care. Malnutrition can result from feeding a patient less than his/her metabolic requirements leading to reduced respiratory muscle strength, increased risk of infection, poor wound healing and impaired normal body function. Overfeeding means providing too many calories that can not be used by the body and are therefore converted to fat storage.
This can cause more CO2 to be produced and result in increased work of breathing. The REE measurement is especially beneficial in the ventilator dependent patient population during the process of weaning
the individual from mechanical ventilation to resume (reestablish) spontaneous breathing. (7)
How do you do the test?
For best results, when having a REE done, there are certain conditions
that need to be controlled and others that just require documenting
at the time of the test. During the test the individual is interfaced with a
metabolic measurement system by means of a facemask or a canopy.
A mouthpiece with a nose clip is also sometimes used, but it may create
overly stressful conditions to a subject (patient).
Important considerations or conditions to improve the Resting Metabolic Test or REE measurement:
(1,4,5)
- Individual should rest for at least 30 minutes in bed or a
recliner before the test, however, the person should not be asleep.
- No food for at least 2 hours before the test.
- Maintain quiet surroundings when the test is in progress and normal temperature. The individual should not move arms or legs during the test.
- Normal room temperature should be maintained, avoid drafts or any condition that might result in shivering.
- Medications taken should be noted, such as stimulants or
depressants.
- Steady state should be achieved, which would be identified
clinically by the following:
5 minute period when average minute VO2 and VCO2
changes by less than 10% and the average RQ changes
by less than 5%.
TEST Duration: 15 to 20 minute.
What you should were: lose fitting comfortable clothes
Where is the Test Held: Scottsdale Community College
How Much is this Test: $45
How do you register for the Test: Email or Call us to set an appointment: info@personalpowertraining.net or 480-628-1607
or contact Scottsdale Community College to register: (480) 423-6000 and register for a the non credit course: FITNESS100 FTVO2 CLASS # 27282
Interpreting the REE
Interpreting the measured REE includes comparing the results to the
predicted level of energy needs for that individual. Determining the 24
hour calorie intake of that individual from either an oral diet or
specialized nutrition therapies (through feeding tubes into the
gastrointestinal tract or intravenous administration) is required.
It is important to assess the RQ to make certain it is within
physiological range and consistent with the person's calorie intake
and medical history. The physiological range of RQ is 0.67 to 1.3. This value
represents the combination of carbohydrate, fat and protein being used
for energy. If the RQ is greater than 1.0, decrease the total calorie
intake and adjust the carbohydrate to fat ratio. If the RQ is less
than .81 increase the total calorie intake, dependent on the goal for
the nutrition therapy. Food sources and conditions have specific RQ
values that are useful when interpreting the REE and making
recommendations for changing dietary goals and feeding regimens. (1,4,5)
Energy source/condition RQ
prolonged ketosis <0.70
fat 0.70
underfeeding <0.71
protein 0.80
mixed energy 0.85
carbohydrate 1.00
fat storage >1.00
Use of REE in conjunction with weight management programs
In weight management programs, when an individual has trouble losing
weight a frequent comment is that ones metabolism is slow. This can
result in failure of the individual to adhere to a weight management
program incorporating a reduction in total daily calorie intake.
However, once the actual REE is done, there is no longer need
to speculate about the normalcy of metabolism for that person.
Successful maintainers of weight loss report continued consumption of a
low-energy and low-fat diet. (8) Efforts to improve weight loss and
maintenance need to focus on strategies to increase calorie expenditure
through exercise and an appropriate diet based on measured energy needs.
The goal is a lifelong commitment to healthful lifestyle behaviors. (6)
An example of how to successfully use the REE measurement in a weight
management program requires interpretation and counseling by a
registered dietitian. After measuring the REE and calculating the 24
hour intake, the individual would be instructed on reducing their food
consumption by approximately 200-300 calories a day below the
measured REE. This should result in about 1 pound weight loss per week
with additional weight loss due to exercise. If the REE is extremely
low then the focus would be on maintaining the calorie intake at the REE
level and gradually increasing to at least 30 minutes of enjoyable
activity each day.
Clinicians monitoring weight management programs would be able
to determine if their clients are actually following a reduced calorie
diet based on REE, RQ and the amount of weight loss. These
measurements would be very useful in detecting failure to adhere
to the diet and facilitate better understanding by the client in
achieving his/her weight goal.
It is important that an individual have a framework for making healthful
food choices to obtain realistic weight reduction and maintenance
goals. The challenge is to balance adequate nutrient intake with the
individual's desire to lose weight rapidly and to address the numerous
myths concerning diet modification. The REE takes the guesswork out of
determining the goal for the calorie intake to achieve the desired
outcome.
References
1. Feurer I and Mullen JL. Beside measurement of resting energy
expenditure and respiratory quotient via indirect calorimetry. Nutr
Clin Prac. February 1986;1:43-49.
2. Frankenfield DC, et al. The Harris-Benedict studies of human basal
metabolism: history and limitations. J Am Diet Assoc. 1998;98:439-445.
3. Garrel DR, et al. Should we still use the Harris and Benedict
equations? Nutr Clin Prac. June 1996;11:99-103.
4. Matarese L. Indirect calorimetry: technical aspect. J Am Diet
Assoc. 1997;97(suppl 2):S154-S160.
5. McClave SA and Snider HL. Use of indirect calorimetry in clinical
nutrition. Nutr Clin Prac. October 1992;7:207-221.
6. Position of The American Dietetic Association: weight management. J
Am Diet Assoc. 1997:97:71-74.
7. Schwartz DB: Pulmonary failure. IN Matarese LE and Gottschlich MM:
Contemporary Nutrition Support Practice. Philadelphia, W. B. Saunders,
Co. (In press)
8. Shick SM, et al. Persons successful at long-term weight loss and
maintenance continue to consume a low-energy, low-fat diet. J Am Diet
Assoc. 1998;98:408-413.
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