Transcript Body image - DuVall School News

Nutrition, Diet, and Exercise
Body image is the way a person
perceives his/her body shape and
weight.
Negative body image = ashamed,
self-conscious, and anxious about
your body
Positive body image = accepting,
comfortable, and confident in your
body
Ideal – differs from culture to culture;
dealing with societal pressures
Nutrition affects
our health
how energetic we feel
how we look.
Body shape is determined by four
factors: heredity, posture, weight, and
conditioning
Which factors can we control?
Formula for weight management
energy intake
+
energy output
=
weight
Energy intake - the calories we
consume through food and
beverages.
Protein and Carbohydrates = 4
calories per gram
Fat = 9 calories per gram
Energy output is determined by the
calories burned in normal functioning,
as well as during growth, physical
activity, and body repair.
Nutrient dense – a food with a high
amount nutrients and low amount of
calories.
According to the food guide
pyramid:
 Variety means eating different foods within
each food group.
 Moderation means that foods with high
calorie and/or fat content should be eaten
less often then other foods.
Key nutrients:
 Calcium and Vitamin D are necessary for
building and maintaining strong bones.
Found in dairy products.
 Potassium is necessary for maintaining a
healthy blood pressure.
Found in fruit and vegetables – such as
bananas, cantaloupe, and kiwi
 Iron is used to carry oxygen in the blood.
Found in meats and some vegetables.
Set-point – a natural weight that the
body will defend and protect
Body composition – 2 components
lean tissues (muscle, bone, and
organs) that are metabolically
active
fat (adipose) tissue that is not.
Metabolic rate – the amount of
energy the body expends while a
person is at rest.
Exercise increases the metabolic rate
for several hours.
The more muscle you have, the
higher your metabolic rate will be.
Aerobic exercise - performed at
moderate intensity for longer duration.
20 minutes or longer
Example long distance running or
cycling
Anaerobic exercise - high intensity
workouts performed for a short
duration of time.
30 seconds to 3 minutes
Example sprinting or weight lifting
Overweight – a person who exceeds
the recommended weight for his/her
height and age.
Obesity – a person who is 20% or
more over the recommended body
weight.
Long-term consequences of being
overweight or obese:
Diabetes
High blood pressure
Chronic heart disease
Some cancers
High cholesterol
Subject to social stigma and ridicule
about physical appearance
Eating Disorders
Anorexia – an eating disorder that
involves severe loss of weight from
excessive dieting
Bulimia – an eating disorder that
involves binging on food and purging
by vomiting or using laxatives
Your body image is an indicator that
you may develop an eating disorder.
Differences between a reliable
source and a questionable source
 Reliable source:
 Long history of accuracy and good
reputation
 Quotes research and respects authorities
 Shares the source of the information
 Has excellent qualifications
 Does not try to manipulate people in order
to make a profit
 Questionable source:
 Spreads information that is not supported
by research
 Does not name source fro the information
 Makes claims that are unbelievable
 Relies on opinions and statements by
people who are unqualified