. Flashcards
Energy
the fuel our bodies need, to stay alive and carry out physical activity
EAR
estimated average requirements-the average amount of energy or if a nutrients required by people in a particular age group
Functions of energy
why do we need it?
Energy is needed for growth,development and all the bodies processes like breathing. It’s also needed during pregnancy,lactation and puberty as well as any physical activity.
How does BMR affect energy requirements
(your bmr is the amount of energy your body needs at rest) Infants and young children have a high BMR sue to rapid growth and development, men also usually have a higher BMR due to a large muscle mass. Elderly people have a low BMR because muscle mass decreases with age. 75% of energy is needed to maintain our BMR.
how does PAL influence energy requirements?
Energy is used for all body activities so the high your PAL the higher your energy requirements.
How does age affect energy requirements?
During childhood and adolescence energy requirements increase due to growth, however ageing reduces energy need as growth has stopped,levels of PAL may decline and metabolism slows
how does pregnancy affect energy requirements?
During the final trimester a women’s energy requirements are slightly higher to accommodate the developing baby however it’s only by an extra 200kcals a day.
How many kcals does 1g of fat provide
9kcals
how many kcals does 1g of protein provide
4kcals
how many kcals does 1g of carbohydrates provides
3.75kcals
how can food intake help to achieve energy balance?
eating nutrient dense food rather than energy dense means you can meet energy needs without taking in unnecessary kcals.
how can portion size help someone to manage their weight
correct portions sizes are just as important as having a balanced diet and maintaining a healthy weight because even if you eat the right food you may be consuming too much.
how many kcals should men consume
2500 kcals
how many kcals shoukd women consume
2000 kcals
If you eat less food then you need you..
lose weight