Topic 4: Energy Balance Flashcards
what factors affect our BMR?
infants and young children have higher BMW as they grow rapidly
men often have higher BMR than women
older adults have lower BMW due to muscle mass
what factors affect energy requirement?
gender - male need more than female, more muscle mass
age - babies and young children more energy as they are growing
activity levels - more active, more energy
health
pregnancy - feeding for 2
size, body weight and genetics - lean body, more metabolically active, more likely to burn off excess energy
what is energy needed for?
keep the heart beating
make chemical reactions happen
keep all organs working correctly
allow us to move keep us warm
provide stores of energy
allow muscles to work
what is energy balance?
energy in = energy out
What is our primary source of energy?
carbohydrates
do fats supply the body with energy?
yes
how much of the energy we consume is used for our bodily functions?
70%
What is our basal metabolic rate?
BMR = metabolic rate at rest
How do you calculate BMI?
weight (kg) / height (m^2)
what is your physical activity level?
the amount of energy an individual uses to complete different activities
how much energy is in 1g of carbohydrates?
3.75kcal/16kJ
how much energy is in 1g of fats?
9kcal/37kJ
how much energy is in 1g of protein?
4kcal/17kJ
