Part 18 : Nutrition--Healthy Eating,
Hydration & Supplements
NUTRITION--HEALTHY EATING, HYDRATION &
SUPPLEMENTS
Fat Free Facts
- Fat free does not mean calorie free. Too many calories from
sugars and starches may also add extra weight.
- Most fat free and reduced fat foods contain more sodium than
their regular versions.
- We need some fat to absorb the fat soluble vitamins, A, D, E,
and K.
Tips for Healthy Eating
- Forget the word "diet ." The word "diet " has
all sorts of connotations; people are always "going on a diet" or
"falling off a diet". Make an effort to just eat smarter by
making a few small, but important, lifelong eating changes.
- Variety is the key. One of the greatest joys of life is eating
and trying new foods and new recipes. Do not limit yourself to the
same few selections day after day, you may become "burned out."
Try at least one new food or recipe a week to broaden your
horizons.
- All things in moderation. There is no such thing as a
"bad food ." It is okay to reward yourself periodically
with a special treat such as a rich dessert. If you tell yourself
you can never again have some of your favorite foods, your goal of
eating smarter will be short-lived. Just learn to plan for these
treats by moderating your intake in other areas that day.
- Base food selections on the food guide pyramid. This eating
guide helps you make wise and varied food choices. We need foods
from all the food groups to make up a balanced, healthy diet. The
food guide pyramid suggests the following for each day: between
6-11 servings of bread, cereal, rice and pasta; 3-5
servings of vegetables; 2-4 servings of fruits; 2-3
servings of milk, yogurt and cheese; 2-3 servings of
meat, poultry, fish, dry beans, eggs and nuts; limited use of
fats, oil, and sweets.
- Do not go grocery shopping on an empty stomach. If you are
going to do anything on an empty stomach, make it menu planning--
you will be much more creative in your planning if those digestive
juices are flowing. However, going shopping while you are hungry
may lead to a cart full of poorer food choices and a higher
grocery bill. Plan your menus ahead of time and shop carefully for
healthy selections and good prices. Each week, choose one food
group or aisle and read the nutrition labels carefully on those
products. The new nutrition labeling has a lot of valuable,
easy-to-understand nutrition information to help you make wise
choices.
- Fresh is best. Although we live in a "grab and go"
world, there is nothing more nutritious than high quality, fresh
foods prepared with your own hands. It really doesn't take that
much longer to prepare fresh vegetables than it does to open a can
or a freezer bag. Processed foods sometimes has more sodium, fat
or other ingredients or additives. Consider shopping the outside
aisles of the grocery store where the fresh foods are found and
limiting your food purchases on the inner aisles.
When nutrition information is not available, use several
"fat-skimming" strategies:
- Order small portions or share a meal with a friend.
- Take half of anything you order home and use it later for
another meal.
- Ask for salad dressings,. sour cream, butter and margarine on
the side. Rather than pouring your dressing over a salad, dip the
tines of the fork into the dressing and then spear a bite of
salad.
LOSE WEIGHT?
- Dropping fat calories to 20 to 30 percent of total
calories helps shed excess pounds and lowers blood cholesterol
levels.
- To lose weight, you have to burn off more calories than you
eat. Some people do this by adding exercise. In the process,
they lose fat but build muscle and weigh the same.
- Other people exercise but end up eating more. Even though they
eat fat free foods , they get plenty of calories that negate the
deficit. Because fat creates a feeling of fullness, people who
eliminate fat often tend to feel hungry and continue to eat. The
calories add up!
- You might have better success if you include a small amount of
fat with each meal.
GAIN WEIGHT?
To gain weight, you have to consistently eat more calories than
when you are maintaining weight. The easiest way to do this is to
drink extra fluids like low-fat milk or juices. Cranberry juice is
particularly high in calories.
Hydration: Sports drinks or
Water?
The human body consists of approximately 65 percent water.
Adequate fluid intake is an essential component of athletic
performance.
FLUID FACTS
- Body weight is 60 to 70 percent water
- Muscle tissue is 70 to 75 percent water
- Fat is 10 to 15 percent water
- Blood is about 90 percent water (when fully hydrated)
FLUID PERFORMS A NUMBER OF CRITICAL
FUNCTIONS:
- Fluid in blood transports glucose to working muscles and
carries away the lactic acid.
- Fluid in urine eliminates metabolic waste products from the
body.
- Fluid in sweat dissipates heat through the skin.
If too little fluid is consumed or too much fluid is lost through
perspiration, athletic performance can suffer. In extreme cases,
medical complications can occur.
OTHER FLUID FUNCTIONS:
- Water (in saliva and the stomach) helps digest food
- Body fluids help to lubricate the joints and cushion organs
- Blood transports nutrients and oxygen to muscles
- Blood carries carbon dioxide, lactic acid and other waste
products away
- Water helps excrete waste products from your body.
- Water transports heat from the muscles to the skin
- Sweat cools the body
- Water helps to moisten and warm cold air before it hits the
lungs
- Body fluids help to maintain skin temperature in cold weather
HOW MUCH IS ENOUGH?
- Sedentary people should drink about 2 liters of water each
day, active people should consume even more. To increase awareness
of sweat loss during exercise, weigh yourself before and after a
hard workout. Each pound lost represents one pound (.5 liter) of
sweat.
- In preparation for difficult endurance exercise, drink 1 to
1.5 liters of fluid 2 to 3 hours before the event and .25 to .5
liters of water 10 minutes before start time.
- During strenuous exercise, drink as much fluid as possible.
Ideally, .25 to .5 liters every 20 minutes.
- Do not trust your sense of thirst to reflect your need for
fluid. Drink before you feel thirsty.
- Water is always an excellent choice for the recreational
athlete. It is more quickly absorbed than juices or sports
drinks.
- For those who exercise hard for 90 minutes or more, a
beverage supplying 60 to 100 calories per .25 liter helps to
supply the needed energy calories required for continuous
performance. Diluted juices and sports drinks are good
choices.
- Drinks with caffeine and alcohol act as diuretics.
These are not good choices for fluid replacement.
- Electrolyte replacement is usually not an issue among those
who consume a balanced diet.
THIRSTY?
- You've waited too long.
- Thirst is your body's signal that it's already
dehydrated. It is not
proportionate to what your body needs. In fact, the body
may
suppress thirst during exercise.
A Liter low:
Your body loses about 2.5 to 3 liters of water each day through
normal perspiration and excretion. Factor in warm weather, humidity
and exercise and you may lose 1 to 2 liters of water each hour. .5
Liter of fluid loss equals one pound on the scale.
DEHYDRATION
Dehydration occurs at a fluid loss of just 1 percent of body
weight. This is enough to increase body temperature and impair
performance as well as body functions. As dehydration continues,
cramps (especially leg) develop, heart rate is elevated and blood
volume and cardiac output decrease. Severe consequences include heat
exhaustion, hallucinations, circulatory collapse and death at a fluid
loss of 9 to 12 percent of body weight.
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Early signs of Dehydration
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Severe signs of Dehydration
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fatigue
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difficulty swallowing
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loss of appetite
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stumbling and clumsiness
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flushed skin
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numb or shriveled skin
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heat intolerance
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delirium
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lightheadedness
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sunken eyes and dim vision
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dark urine with a strong odor
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painful urination
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muscle spasms
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HOW MUCH WATER?
- This depends on your body size, how much you sweat, how active
you are and what you eat and drink.
- Generally the 2 to 2.5 liter guideline is a good start
- fruits and vegetables are high in water
- caffeinated (coffee, tea, soft drinks) and alcoholic
beverages cause water loss.
- Try weighing yourself before and after exercise to see how
much weight you lose. Then drink (before/during exercise) .5
Liters of water per pound lost. Monitor the volume and color of
your urine to ensure you're getting enough fluid.
ISOTONIC
The term "isotonic" is often used broadly to include many "sports
drinks." However, to be truly isotonic, a product must replace lost
body fluids without causing either swelling or shrinkage of the
cells.
ARE SPORTS DRINKS BETTER?
- Sports drinks do more to enhance calorie intake than anything.
The duration and intensity of an aerobics class (even back to back
sessions) does not create a need to replace electrolytes or carbs
during exercise.
- Replacing sweat losses of sodium, potassium and other
electrolytes is probably a minor concern, unless you are competing
in something like a triathlon.
- Drinking enough fluids is an important part of a sports diet
because adequate hydration can help your sports performance and
prevent the medical dangers associated with heat stress. The
easiest way to tell if you have had enough to drink is to monitor
your urine. Clear-colored urine in significant amounts indicates
adequate hydration -- as do frequent trips to the bathroom!
- Adequate fluid replacement is important for both recreational
exercisers and competitive athletes because fluid in your blood
transports oxygen to working muscles and carries away lactic acid.
But the recreational exerciser whose workout is of low
intensity and lasts less than an hour will sweat minimally and
obviously will not have to monitor fluid replacement as closely as
the highly competitive athlete who sweats hard for 1 to 3 hours at
a time.
THE RECREATIONAL EXERCISER
- If you participate in a low-intensity exercise program, such
as walking 1 or 2 miles, enjoying a gentle bike ride for 30
minutes, or playing recreational volleyball for 30 to 45 minutes,
you are unlikely to become dehydrated because of excessive
sweating. You should simply try to maintain an adequate fluid
intake throughout the day.
WHEN TO WATER DOWN
- Throughout the day, be sure to routinely consume plenty of
fluids. If necessary, carry a water bottle with you.
- Pre-exercise, tank up on .25 to .5 liters of water 15 minutes
before working out. This fluid will be ready and waiting to be put
to use. By consuming only water or sugar free fluids 0 to 15
minutes pre-exercise, you will enhance fat metabolism and thereby
spare muscle glycogen from depletion.
- During exercise, drink about .25 liters of water every 20
minutes.
FIVE BASIC RULES FOR FLUID
REPLACEMENT
1. Cool fluids are best (40 to 50 degrees F)
2. Plain water adequately replaces fluid for most athletes.
3. Don't depend on thirst. By the time you feel thirsty, your body
has already started to dehydrate.
4. Weigh before and after an athletic event. Replace .5 liters of
fluid for every 1 pound lost.
5. Sip water during competition or training.
Should I take vitamin pills?
- If you are active and have a good appetite, you can get a lot
of vitamins in your diet. By choosing wholesome foods you can
double or triple your vitamin intake. For example, if you drink 12
ounces of orange juice, you'll get 200% of the recommended dietary
allowance (RDA) of Vitamin C.
- If you do not eat meat , Iron or Zinc supplements can be
helpful.
- You need to eat well even if you take a supplement.
Fruits and vegetables are the best sources of important nutrients.
The ones with the most vitamins are oranges, cantaloupe,
strawberries, kiwi, bananas, green and red peppers, broccoli,
spinach, tomatoes, carrots and sweet potatoes.
MINERAL AND TRACE
ELEMENT ABSORPTION
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Calcium
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Magnesium
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Zinc
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Absorption increased by:
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Vitamin D
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Vitamin D
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Amino Acids
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Vitamin A
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Absorption decreased by:
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Magnesium
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Calcium
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Calcium
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Caffeine
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Sodium
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Iron
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Manganese
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Selenium
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Copper
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Sodium
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Potassium
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Absorption increased by:
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Amino Acids
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Amino Acids
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Absorption decreased by:
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Calcium
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Calcium
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Calcium
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Iron
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Magnesium
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Magnesium
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Zinc
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Molybdenum
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Vitamin C
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Iron
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Chromium
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Manganese
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Absorption increased by:
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Vitamin C
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Amino Acid Chelates
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Absorption decreased by:
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Calcium
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Iron
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Calcium
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Magnesium
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Iron
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Iron
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Zinc
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Manganese
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Copper
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Chromium
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Manganese
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