Engefy And Nutrient Requirments. Flashcards
SI unit
Energy used when a mass of 1kg is moved through 1m by a force of 1N
Estimated average requirement and Reference nutrition intake
Nutrient reference values: requirements->amount needed to prevent disease recommendations-> optimum amounts RNI upper and lower limits of SD curve EAR middle of curve
Non SI unit
Calorie
The heat liberated on combustion of 1g of pure benzoin acid
Recommended dietary composition
Carbs 55% of food energy
Protein 15%
Fat 30%
Factors effecting energy requirements
Resting metabolism factors: Size Growth ands ageing Food Physical activity: Job Voluntary activity Overall physical activity, ratio of total energy expenditure to RMF
Estimating energy requirements
Predict basal energy expenditure and multiple by activity factor
Scholfield equation
0.063(m) 0.062(f) x weight + PAL MJ per day
May increase in illness
Protein requirements
Highest at 0-5
RNI = 0.8g/kg weight/day
Balance of essential/non essential
Nitrogen balance to determine protein requirements
Normal male:
Sedentary, active
Energy-> 10mj 12
Protein-> 50g 60
Fe2+ -> 10mg 10
Normal female
Sedentary, active
EAR-> 8 10
Protein-> 40, 48
Fe-> 15
Major nutrients for growth
Energy Protein Calcium Iron Vit D
Infant to adult growth requirements
Energy-> increases, peaks at teens, platoes
Protein-> increases, peaks at teens
Ca2+ increases
Fe-> increases
Vit D-> decreases
Essential fatty acids crucial for brain development
Nutritional aspects of pregnancy
Need normal pelvic skeletal growth
Diet during pregnancy effects fetal growth
Extra nutrient needs related to deposition of tissue and their maintenance
Requirements in pregnancy and lactation
2nd and 3rd trimester, lactation Energy 10%, 25% Protein +6g, 15g Ca2+ double Vit c 25% 75% Vit a 15% 50% Vit d times 4 No extra iron Fish oils in third trimester
