Booklet 3 part 2- Exploring dietary health Flashcards
(8 cards)
What is BMR
The amount of energy the body needs to function, such as breathing, keeping at a constant temperature while resting for 24 hours.
How does BMR effect energy requirements ?
The number of calories reflects how much energy the body requires to support vital body functions.
This accounts for 75% of a persons energy needs.
Young people have a high BMR for their size to meet growth and development demands.
Men- higher BMR- bigger muscles mass
Older adults- Lower BMR- Age
How does age effect energy requirements ?
Childhood and adolescents energy requirements increase to meet growth and development demands.
Ageing reduces energy needs as growth has stopped and level of activity has declined.
Energy needs peak at 25 and decline 2% every 10 years
How does gender effect energy requirements?
Adult man- less body fat- 10-20% more muscle mass than women- BMR higher in men.
Men’s calories higher than women’s 5-10% higher except during pregnancy and breastfeeding.
Adolescent men needs more energy to move- women needs less as they are usually smaller and have a smaller muscles mass.
How does state of health effect energy requirements?
Nutritional requirements vary for a healthy and an ill person.
Physiological and emotional stress can affect appetite- less intake of food- less nutrients being absorbed.
Recovery from surgery- increased BMR
Treatment for illness impacts BMR
What is Physical activity levels (PALS)
Amount of extra energy needed to carry out physical activities- running, walking and sitting
People who exercise regularly and have physically demanding jobs need more energy.
How does PALS effect energy requirements ?
When an active person burns calories and if they burn more calories than they eat they lose weight.
Higher PA= More energy needed
Low PA= Less energy needed
