Nutrition
Nutrients
The category of nutrients is divided into two classes,
essential and nonessential
Essential Nutrients- nutrients
the body needs to function properly but cannnot make
on it's own
Non-essential Nutrients- these
are dispensable by the body, because they can be made
within the body as long as it functions properly
Nutrient Density- represents the
portion of essential nutrients in food
Quality Calories- foods with a high percentage of their
total calorie content
have a high nutrient density and are not considered empty calories
What is the RDA?
RDA stands for Recommended Dietary Allowances and
they represent the levels of
intake considered by scientists and nutritionists
to adequately meet the nutritional needs
of almost all health people.
Food Guide Pyramid
Many years ago the United States government created
a graphical representation to
make it easier for all people to understand the
amounts of each food group and its
proportions to obtain your recommended dietary allowance.
Dietary Supplements
not needed in excess of
your RDA
not neccessary for people
eatting a well balanced diet
research is showing that
anti-oxidant supplements can be advantageous
avoid eatting foods with
questionable additives and preservatives
Ergogenics
ergogenics are products
with a theoretical ability to improve performance
Mechanical Aids-
any item used to increase spend less energy doing the same
activity; e.g. lighter running shoes
Psychological Aids-
products or techniques often giving false security of breaking
through a psychological barrier; sometimes these do no harm
to athletic performance and can be allowed to continue
e.g. pre-game rituals, hypnosis
Physiological Aids-
blood doping or infusion of blood may increase oxygen transport
for aerobic endurance; often is dangerous or illegal in sports
Pharmacological Aids-
any hormone that may increase muscle size and strength
not made within the user's body by natural processes
e.g. anabolic steroids
Vegetarians
Vegans-
diet with no animal products of any kind
Ovovegetarians-
allow consumption of eggs
Lactovegetarians-
include dairy products
Ovolactovegetarians-
eat eggs and dairy products
Semi-vegetarians-
only exclude red meats
Deficiencies of Vegetarians
caloric intake must be monitored
keep track of vitamins D and B12, iron, calcium, zinc, and protein
Consumer Nutritional Information
Food labels are regulated
by the Food and Drug Administration (FDA)
They must contain a list
of ingredients (highest to lowest percentage), serving size,
servings per container, and the amount per serving of the following:
total calories, calories from fat, saturated fat, cholesterol, sodium,
total
carbohydrates, dietary fiber, sugars, protein, vitamin A, vitamin C, calcium,
iron
Labels may contain the following
on a voluntary basis:
calories from saturated fat, polyunsaturated, monounsaturated, potassium,
soluble,
fiber, insoluble fiber, sugar alcohols, and other carbohydrates
Food Label Definitions
Free- none or trivial amount
e.g cholesterol free: less than 2 milligrams per serving
Low- very little or low source of
e.g. sodium: fewer than 40 milligrams
High- based on daily reference value high is more than
20% of the DRV
Good Source- based on daily reference value this is 10-19%
of DRV
Reduced, Less, or Fewer- at least 25% less of a nutrient
per serving
compared to the reference food
More or Added- must be 10% or more of the daily value
for the nutrient per
serving compared to the reference food
Light or Lite- must reduce the particular nutrient amount
by 50% or more
Lean- containing less than 10 grams of fat, 4 grams of
saturated fat and 95
milligrams of cholesterol per 100 grams
Extra Lean- contains fewer than 5 grams of fat, 2 grams
of saturated fat, and
95 milligrams of cholesterol per 100 grams
Fresh- unprocessed foods must be in raw state, having
not been frozen or
subjected to any form or processing; does not apply to milks or breads
Athletic Needs, Concerns and Recommendations
Pre-game meals
athlete should have a relatively empty stomach before competition to minimize
gastrointestinal distress
avoid hunger, lightheadedness, or fatigue
eat enough for adequate competitive energy
adequate hydration is important despite weather conditions
pre-game meals should be eaten 3-4 hours before competition
eat foods with high complex carbohydrates, low fat, low protein
do not eat foods high in sugar
Liquid meals
research points to some advantage in using liquid meals as a pre-game meal
contain well balanced nutrients
not bulky; easy digestion
offer between 250 and 400 calories
During competition
primarily needed for endurance sports
avoid heavy foods; look for liquids or easily digested solids
Post-game meals
eat balanced meals
replenish carbohydrates and fat stores; important after endurance sports