Archive for the ‘metabolism’ Category

trans fat vs cholesterol vs drugs in your arteries

Monday, February 16th, 2009

Put down the french fries and lets talk about fats and cholesterol.  do you know what the term saturated fat means?   a fat molecule is nothing more than carbons and hydrogen’s in a long chain like formation.  A fat molecule is considered to be saturated when the linked chain of carbon molecules is saturated to the maximum with hydrogen’s and it’s molecular structure cannot adhere any more hydrogen’s to the carbons. These type of fats are animal fats like bacon, steak, chicken and the stored fat on our bodies. Our bodies prefer to use saturated fat for energy and our liver produces enzymes that float around our blood that react with unsaturated fats and turn them into saturated fats, so our bodies can store them or use them for energy. A unsaturated fat is missing one hydrogen ion from the chain. When one hydrogen ion is missing from the chain, it changes its ionic shape, (gets softer). These are fats like butter.  A poly unsaturated fat is missing 2 or more or many hydrogen ions so its shape changes drastically.  These are the fats in oils, margarine etc.  When you heat a fat molecule, like with cooking, it loses hydrogen’s very quickly and it’s shape changes from say a solid to a liquid. So when we eat foods that are fried in oils that are super heated over and over again they become super poly unsaturated. Foods like potato chips, french fries, donuts.  The reason this is so bad for us.. is because the inside of an arterial wall is lined with hydrogen ions, and areas in our body where blood is under little or no pressure and is  considered static (doesn’t move much) like around the heart and the neck,  the poly unsaturated fat molecules and the liver enzymes have time to react with, or steal the hydrogen ions off the artery walls to change unsaturated fats back into saturated fats. When enough hydrogen’s are missing from the arterial walls, our immune system begins to recognize this as damage (holes) in the artery. Our immune system fills in the holes left behind with blood platelets and cholesterol sticks to the platelets forming a layer of plaque. When this process happens over and over again, the plaque builds up and restricts the opening and the blood flow.  So i ask you, who is to blame, cholesterol or poly unsaturated fats. Plaque is not caused from excess cholesterol,  like TV adds want you to think. Actually Cholesterol is made in the liver from 3 saturated fat chains put together and our bodies use it to make our hormones. So even if you never ate any more cholesterol ever again, your liver would just make it’s own.  cholesterol medications are designed to slow down cholesterol production in the liver but the side effect is that it causes damage to the liver, that is why you have to have blood tests every 6 months to see if your liver enzymes are elevated. Elevated liver enzymes in the blood mean liver damage and now you’ll have to stop taking cholesterol medication and hope that your liver heals itself. Do you know that ina recent study over the past 5 years that there is no decrease in the rate of heart attacks. So what good is the medication. Besides liver damage there is a whole list of other side effects that these medications due to the rest of your body. so put down the french fries and go for a walk once and awhile.

Dr Mike
480 607 4436

Metabolism and Exercise

Sunday, February 8th, 2009

OK,  lets end the debate about target heart rate and fat burning.  The main difference between someone who is in shape and someone who is a couch potato, is not their muscles, it is the amount of red blood cells they have. Red blood cells fill with oxygen in the lungs everytime you breath and the heart pushes them through out your body to all of your cells.  Professional athletes will often cheat this system with a process called blood doping.  They will remove a liter of their blood one month before their big event. Their bodies replace the missing blood, and the night before the contest they add the other blood back in, giving them 6 liters instead of 5 liters of red blood cells.  Why would they do this?  Muscle cells burn sugar, fat and oxygen to make energy, this process is called aerobic metabolism. The more oxygen you can get to the muscles means more energy available for performance (strength and endurance).  We used to think that if we want to burn more fat, we should exercise at a level where this process is at a maximum of fat burning = ” target heart rate”  Makes sense right.  Well, when a person does cardio exercise at their target heart rate, and they stay in the “aerobic zone” for more than 20 minutes, they start burning extra fat, as well as sugar, and oxygen, but only while they are doing the exercise.  In a recent study on metabolism,  they took 100 obese people and had them ride the bicycle for 60 minutes a day, 6 times per week, at their target heart rate for a period of 6 months. The next 100 people rode the bikes for 30 minutes, 3 times per week, for 6 months, but they were instructed to ride at a steady pace for 3 minutes then sprint as fast as they could for 1 minute and then back down to a steady pace for 3 minutes again and repeat for 30 minutes (basically a hill program).  At the end of 6 months, the people who really worked out 75% less often, actually lost 9 times as much fat and weight as the other group.  How is this possible? let me explain.  I like to use the example of a sprinter, have you ever seen a fat one?  They only run 100 yards.  Yet they are lean, ripped, and muscular. why?  When you do an aerobic activity in the target heart rate zone you are only burning extra fat while you work out. The people who were doing the hill program were pushing their bodies into what is called “oxygen debt”. Where the muscles can no longer efficiently work aerobically(with oxygen) and are forced to work an-aerobically (without oxygen). When the muscles are working harder then the lungs and heart can keep up with, you reach oxygen debt, and the muscles are forced to burn sugar only to make energy. (an-aerobic metabolism). The problem… they can’t do this for very long and eventually you have to stop the exercises altogether.  But if you repeatedly do this type of exercise, you body responds by producing more and more red blood cells, so when you try and drive it again into oxygen debt it gets harder and harder.. the benefit is… with all of these extra red blood cells floating around in your blood, every time you breath normally, (15 times per minute), there is now a lot more oxygen in your body’ s blood and in your muscle cells and in turn you burn more calories during your normal daily activities and even more while you work out (= increased metabolism).  Give it a try you will be amazed at the results. (caution, when you increase your metabolism like this you tend to be extra hungry so watch the calories you eat)  If you would like more information check us out on the web

Dr Mike
480 607 4436