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Food
and nutrition have become a major focus at altitude.
The most important reasons for this are;
Weight loss
at altitude is common
Significant weight loss at altitude is associated with loss of muscle mass
and
poorer physical and mental performance.
The factors contributing to weight loss at altitude include:
Reduced food intake related to
• Loss of appetite secondary to acute mountain sickness / altitude itself
• Unpalatability and monotony of food
Increased requirements related to
• Increased physical activity over a prolonged period
• Increased basal metabolic rate (the body's energy requirements at
rest)
by 10-15%
Gastrointestinal infections are common at lower altitudes
Impaired absorption of food from the gut may also play a role at
altitudes >5,000m.
Most people will preferentially lose fat in the initial stages of weight
loss, however, the proportion of fat lost decreases at altitude and loss
of muscle
mass becomes increasingly prominent. Above 5,400m, up to 75% of the weight
lost may be muscle. Those with a higher percentage of body fat at the outset
tend
to lose more weight than those with lower. Women suffer less extremes of
weight loss than men; this seems to be mainly because their appetite is retained.
In an attempt to minimise weight loss at altitude, it is helpful to estimate
requirements and then attempt to achieve a balance of energy intake
and expenditure.
While at sea level, each team member kept a food diary for a 3-day period,
and based on this, our nutritionist estimated
our usual intake. She then
calculated our basal metabolic rate and our approximate energy requirements
for climbing
carrying a load of 10-20kg. To allow for the increased basal metabolic rate
at
altitudes of greater than 6,000m, she increased this figure by 10%-15%. Comparison
of these figures, gives an idea of the increased intake required at altitude.
This is relatively easy at lower altitudes where availability and variety
of foods are not limiting factors; above Base Camp/Camp 2, where the choice
is
more limited and m
ain meals are restricted to freeze dried packs, it becomes
increasingly
difficult.
The most important points are to:
Bring as wide a choice of foods as possible
Select foods with as a high a calorie count as possible (especially carbohydrate)
Try to flavour foods with herbs/spices/curries to improve taste
Bring high calorie supplements to add to drinks or take alone
Try all supplements before leaving home to ensure you will tolerate
them
while on expedition
Refueling for peak performance on Everest
Nutrition will play a critical role in our attempt to summit Everest.
To
have enough energy you need to consume enough energy. Getting adequate and
quality fuel (food) is one of the keys to peak performance. If we fail to
achieve this, our physical performance will be diminished,
we will also feel
weak and tired and so increases the odds for us to make poor decisions, and
this, as you can imagine could means the difference between achieving our
goal and survival.
The reality on the mountain
Extreme weight loss is fact on Everest. This occurs initially because even
at rest on the mountain your basal metabolic rate increases by 10%. (This
means your body it burning more fuel (food) just to survive)
Other factors than contribute to weight loss at altitude is reduced food
(fuel) intake due to altitude sickness, unpalatable food, most foods taste
bland, as the altitude seems to effect your taste buds and so in order to
maintain your energy levels you need to bring yourself to eat or else
your
going to lose valuable pounds.
Naturally the increased physical activity over the period of the expedition
will place demands on the body. This is true whether you're a world
class
athlete or a week-end warrior, when you train regularly you need
to consider
whether your body is getting the nutrition it needs to support the demands
your are placing on it.
So for us on the mountain it is important to have regular intake of high
quality nutrients to minimise the risks associated with weight loss.
It is worth remembering that, in every day life, a poor diet will diminish
your physical performance and also increase your odds of developing some
type of illness (colds, flu etc )
How to get that extra edge
Imagine spending months organising every minute detail that is vital to a
successful expedition and then finding yourself within reaching distance
of your goal, a couple of hundred meters from the highest point in the world.
Months of hard training and personal sacrifices have been endured to finally
bring you to here, only to find that you have run out of energy. Its decision
time, another 45 minutes of effort, on Everest that relates to another 540
steps, and youíll be standing on top of the highest point in the world,
a lifetimes dream realised, but your running on empty.
What do you do?
I know as you read this your saying to yourself 'I'd go on' but in reality
choosing this option is fatal. The brave decision is to focus on getting
home safely.
The extra edge you need to overcome the above predicament will be found in
the nutrients you feed your body every day of your life. Choosing to fuel
your body with good food is the secret. Plant foods like fruits and vegetables
should be the foundation of your diet. Thatís not because animals
foods are bad for you- it's because plant foods are so good for you. If you
eat at least the minimum number of recommended servings per day, you'll be
on the road to peak performance and better health, now and for the rest of
your life.
The truth about the food you eat
Here is why you won't get much speed or stamina if your diet relies on protein
or fat.
The energy requirements of muscles used in intense activity (climbing Everest
in our case) are met largely by oxidisation of carbohydrate
- with only 5%
from the breakdown of protein. That's why you can't rely on a high protein
diet.
Fat is a good fuel for walking, but not anything faster. That's why you can't
rely on a chocolate bar for a marathon.
The higher the intensity of exercise, the more you rely on carbohydrate.
When you reach 75% of your oxygen uptake carbohydrates replaces fat as the
major fuel.
If you don't have enough carbohydrates in your system, you drastically reduce
your speed, stamina and recovery time.
So for us to avoid been within reach of our goal and not to be able to continue
because of fatigue it is essential to not only feed our bodies good quality
foods (fuel) but 60 to 70 % of the calories should come from carbohydrates.
Carbohydrates fuel your muscles and power you through your workout. The best
sources are complex carbohydrates such as brown rice, whole wheat bread,
pasta, and fruits and vegetables. Yes biscuits, soda and sugar are carbohydrates
and while they provide you with calories, they lack the vitamins, minerals,
and fibre that are abundant in complex carbohydrates and crucial for good
health. These simple sugars alone will not help for endurance but they can
assist us when we high on the mountain and in need of a 'quick hit'. But
it is the complex carbohydrate that will deliver the consistency of energy
required over the duration.
How Good Food Helps Build a Stronger Body
"Unlike drugs, nutrients do not have any rapid effects. No Quick fix.
The business of nutrition is to build a better body which has to wait on
nature
to turn over body cells. A blood cell lasts 60/120 days. In 3 - 4 months
your whole blood supply is completely replaced. In 6 months almost all the
proteins in your body die and are replaced, even the DNA of your genes. In
a year, all your bones are replaced, constructed entirely out of the nutrients
you eat. When you start feeding it better, you have to wait on your body
to grow new, improved cells. The shortest nutritional program we will give
any athlete is 6 months"
Dr Michael Colgan - Optimum Sports Nutrition
Once you have read the above it becomes clear that not only what you eat
during your chosen event is of importance. Optimum nutrition is important
for everyone, and especially for athletes and active individuals. The body
is subjected to higher levels of activity and performance, which increases
the need for a more perfect balance and plentiful supply of nutrients. Where
should this added nutrition come from - foods or a nutritional supplement?
Because of the limited food choices available to us and the vital need
to
achieve optimal nutrition we choose to 'bridge the gap' by using
supplementation. First you must understand that pills can never be a substitute
for food, but we believe after much research that we have sourced the next
best thing.
Recently, a new nutritional technology has made it possible to get a 'whole
food concentrate' in a capsule. The concept is to take whole foods, in this
case 17 of the most nutritional fruits and vegetables, juice them and then
reduce them to a powder through a highly effective process of dehydration.
This is then combined with more vitamins and minerals from natural sources
and put in capsule form. Thus, you have the nutrient essence of the food,
and in a convenient form. Since every food has not only
vitamins and minerals,
but enzymes, fibers, and thousands of recently discovered 'phytochemicals'-
this concept is dramatically superior to taking isolated vitamins and minerals.
We have found Juice Plus+ to be the most thoroughly tested nutritional supplement
on the market place today. It has been analyzed to determine what's in it,
where it goes in the body, and what it does when it gets there.
It is because of this we have chosen Juice Plus+ for the Irish Everest 2004
Expedition.
We will be using both the Juice Plus+ capsules and the powered version called
Juice Plus+ Complete.
The capsules will deliver the essence of 17 of the most Nutritional Fruits
and Vegetables. We see it as a natural, simple and convenient way of supplementing
the daily nutrition we need from fresh fruits and vegetables.
Juice Plus+ Complete gives us a proper content of vegetable proteins, simple
and complex carbohydrates, vitamins, minerals fibre and enzymes as well as
the 17 different fruits and vegetables juice powders contained in the capsules.
For further information on Juice Plus+ please contact Padraig at 087-6595258
or e-mail juicefit@eircom.net
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