Here is what you really need to know
According to Dr. Norman Kaplan, from the University of Texas Southwestern Medical Center and author of Clinical Hypertension, most overweight people are hyper insulinemic (too much insulin released into the bloodstream). Insulin is the storage hormone released by the pancreas when blood sugar rises. The only way to control insulin levels is to control the rate and level of blood sugar elevation. The only way to do that, is to reduce the intake of refined or simple carbohydrate (including most so called whole grain products). Moderate to strenuous exercise does lower insulin for short periods of time.
High carbohydrate diets can promote hypoglycemia, even in the physically active, and the elevation of triglycerides (a heart disease risk factor). Remember that carbohydrate depletion in the muscles is usually not the limiting factor to continued quality exercise performance, unless the activity exceeds 75 minutes at 80+% of aerobic capacity. Triglycerides are the most abundant fatty substance in the body, making up most of your stored fat. A triglyceride is made of one half a sugar molecule (glycerol) with three fatty acids attached. When levels of triglycerides in the blood go up, they are considered a negative risk factor to clogged arteries. The solution? Reduce the intake of insulin stimulating carbohydrates and exercise regularly.
Fat in storage is reduced in two ways. First, it can be metabolized as an energy source through moderate intensity exercise (from sleeping to conversational intensity exercise). Second, there is a concept of Ketosis where incompletely metabolized fat molecules are released into the blood and removed through the kidneys. Ketosis occurs only when one is on a severely restricted carbohydrate diet. This is how the Atkins Diet and the Protein Power Diet work. Contrary to popular belief - dietary induced ketosis is not considered dangerous according to Dr. Calvin Ezrin of the UCLA division of Endocrinology and author of the Endocrine Control Diet (an Atkins style diet).
Fat mobilization (removal from storage for use in energy metabolism) can be inhibited in two ways. First is through the elevation of blood insulin in response to carbohydrate consumption. The second is though the elevation of blood lactic acid which occurs in response to intense (anaerobic) exercise. The solution? To reduce fat in storage, control your insulin with a reduction in simple or refined carbohydrate intake and participate in conversational intensity exercise for about 4 hours per week. (Try not to do the 4 hours all on the same day).
There is evidence, some recently published in the journal Medicine & Science in Sports & Exercise by a group from New York State University in Buffalo and by another group in New Zealand, demonstrating that higher fat diets (up to 50% fat) can improve endurance performance without negative effects on immune functions nor blood lipid parameters. Once again a suggestion that carbohydrate emphasis may be over done.
Muscle is the most metabolically active tissue. The more muscle you have the more fat you metabolize. (Seems unfair doesn't it? The more fit burn fat faster.)
OK - So, now really, what should I eat?
In simplest terms, to control insulin and optimum hormone production, I am an advocate of 40 - 30 - 30 eating plans. This is the plan used by Mark Allen during the last two of his six Hawaiian Iron Man wins. My friends over at Coaches Inc. told me just last week of a client who followed this plan and ate peanut butter and turkey sandwiches during a successful ultra marathon.
Carbohydrates should make up 40% of your calories. These are low Glycemic Index (a measure of how fast they raise blood sugar) carbohydrates like vegetables, except for corn and potatoes. Also emphasize fruit except for bananas and dried fruits.
Protein should make up 30% of your calories. I emphasize high quality digestible protein sources including soy and selected whey protein drinks. Always eat protein at every meal and every snack - no exceptions. Eat some of your protein foods first to further control the rate of the rise in blood sugar. Protein requirements range from 0.75 grams per pound of desirable weight for the sedentary to 1.0 gram per pound of desirable weight for the physically active.
Fats should also make up 30% of your calories. Emphasize the good fats which includes nuts, seeds, avocados, olives, cold pressed oils, and supplements like lecithin capsules (never granules nor liquid due rancidity issues), GLA and EPA capsules. It is these good fats in the proper insulin controlled environment that will produce optimum levels of all your important hormones.
Never eat cheap hydrogenated oils, deep fried grease and margarine of any kind in an attempt to avoid the notorious trans fatty acids . Consume saturated fats in moderation but don't be so paranoid as to exclude them. A responsible intake of essential fatty acids will balance out any potential negative effects of saturated fats. Cholesterol consumed has nothing to do with blood cholesterol levels. In fact elevated insulin from too many carbohydrates will stimulate the liver to make more cholesterol and cause more harm than eating eggs or other animal fat sources.
Responsible supplementation is no longer an option if optimal health is desired. In addition to lots of protein, vegetables, fruit, modest intake of whole grains, and essential fats, you need to prop up your nutritional arsenal with a well planned supplement program. Oh yes, don't forget to exercise and drink lots of pure water.
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