II. Protocol: Step 1 - Estimate Resting Energy Expenditure (REE)
- Based on Mifflin-St Jeor Equation
- Males Resting Energy Expenditure
- Start: 10 x (Weight in kilograms) + 5
- Add: 6.25 x (Height in centimeters)
- Subtract: 5 x (Age in years)
- Females Resting Energy Expenditure
- Start: 10 x (Weight in kilograms) - 161
- Add: 6.25 x (Height in centimeters)
- Subtract: 5 x (Age in years)
III. Protocol: Step 2 - Estimate Daily Caloric Need
- Consider Activity factor (AF) of 1.0
- AF >1.0 grossly overestimates caloric needs
- Using activity factor of 1.0 may be weight neutral
- Mucha (2007) HP Primary Care Medicine, Lecture
- Bezera (2001) J Amer Dietetic Assoc 101 [PubMed]
- Determine Daily Caloric Need
- Resting Energy Expenditure x Activity Factor
- See Daily Energy Allowances
- Moderately active adolescents (e.g. teen athletes) may have high energy requirements to sustain activity, growth
- Females may require 2200 kcals/day, while males may require 2800 kcals/day
IV. Protocol: Step 3 - Calculate Adjusted Caloric Intake (for intentional weight loss)
- Determine daily caloric deficit (typically 250 to 500 kcals/day)
- Deficit of 500 Kcals/day = 3500/week (1 pound/week)
- See precautions below regarding over-estimation of weight loss with 3500 calorie/pound rule
- Determine Adjusted Caloric Intake
- Daily Caloric Need - Daily caloric Deficit (500)
- Do not lower intake below 1000 Kcals/day
- Consider using REE x0.8 for weight loss program
- Mucha (2007) HP Primary Care Medicine, Lecture
- Bezera (2001) J Amer Dietetic Assoc 101 [PubMed]
- Consider calorie intake goal based on body weight range
- Body weight <200 pounds: 1000 Kcals/day (500 kcal deficit per day)
- Body weight 200-249 pounds: 1200 Kcals/day (750 kcal deficit per day)
- Body weight 250-299 pounds: 1500 Kcals/day (1000 kcal deficit per day)
- Body weight 300-349 pounds: 1800 Kcals/day (1250 kcal deficit per day)
- Body weight >350 pounds: 2000 Kcals/day (1500 kcal deficit per day)
- Klein (2002) 123(3): 882-932 [PubMed]
V. Precautions: Over-estimation of weight loss with 3500 calorie/pound rule
- Weight loss estimates based on 3500 calorie deficit per pound weight loss will markedly overestimate loss
- Naive weight loss approximation with 3500 calorie rule (due to compensatory mechanisms)
- For every 100 calorie deficit, expect 10 pound weight loss over time
- Year 1: Weight loss of 50% of total estimate (5 pounds per 100 calorie deficit/day)
- Year 3: Weight loss of 95% of total estimate (9.5 pounds per 100 calorie deficit/day)
- Resources
- FPnotebook Resting Energy Expenditure Calculation
- NIH Body Weight Simulator
- References
VI. References
Calculation (FPnotebook.com: DrBits) Open in New Window
Calculation (FPnotebook.com: DrBits) Open in New Window
Images: Related links to external sites (from Bing)
Related Studies
| Definition (NCI_NCI-GLOSS) | Refers to the number of calories (energy content) consumed. |
| Definition (MSH) | Total number of calories taken in daily whether ingested or by parenteral routes. |
| Definition (CSP) | amount of food energy consumed in the diet. |
| Concepts | Quantitative Concept (T081) |
| MSH | D002149 |
| SnomedCT | 162533000, 139806001, 13210007, 226320007 |
| English | Caloric Intake, caloric dietary content, Caloric intake, nutrient ingestion, nutrient intake, intake energy, energy intake, intakes nutrient, caloric intake, energy intakes, Energy Intake, Dietary calorie intake (finding), Caloric intake, function (observable entity), Dietary calorie intake, Nutrient intake, Energy intake, Dietary calorie intake (observable entity), Nutrient intake (observable entity), Caloric intake (function) |
| Spanish | ingesta energética, Ingestión de Energía, Ingestión Calórica, ingesta calórica (entidad observable), ingesta calórica, ingesta calórica (función), ingesta calórica de la dieta, ingesta de nutrientes (entidad observable), ingesta de nutrientes, ingesta dietaria de calorías (entidad observable), ingesta dietaria de calorías |
| Swedish | Energiintag |
| Czech | kalorie - příjem, energie - příjem, příjem kalorií, kalorický příjem, energetický příjem |
| Finnish | Energiansaanti |
| French | Prise calorique, Consommation calorique, Consommation de calories, Ration calorique |
| Russian | ENERGII POTREBLENIE, KALORII POTREBLENIE, КАЛОРИЙ ПОТРЕБЛЕНИЕ, ЭНЕРГИИ ПОТРЕБЛЕНИЕ |
| Japanese | エネルギー摂取量, カロリー摂取量, 熱量摂取量 |
| Croatian | ENERGIJA, UNOS |
| Polish | Spożycie kalorii, Zapotrzebowanie kaloryczne, Spożycie energii |
| Norwegian | Not Translated[Energy Intake] |
| Portuguese | Captação de Energia, Ingestão Calórica, Ingestão de Energia |
| German | Energieaufnahme, Kalorienaufnahme |
| Italian | Assunzione giornaliera di calorie |
| Dutch | Energie, opgenomen, Opgenomen energie |
