Tuesday, July 19, 2005

Why does fat have a propensity for being stored in the midsection?

Before this is all said and done I might need to retitle my blogspot 'Ask a personal trainer'. Fat has a dual role in the human body. Its primary function is to serve as stored energy. Every gram of fat on the earth is 9 kilocalories or simply calories to us. whether it is a 1g drop of olive oil, 1 gram of beef fat or 1 gram from your stomach. Its all the same. Why store it close to the midsection. Frankly, thats where the action is. If you had a train where would you put the coal car? I'm guessing somewhere accessible to the locomotive. That is the same concept with fat. The body looks to store fat close to internal organs 1. for accessibility 2. for protection 3. it needs to store it somwhere relatively cool on the body. You would be hard pressed to find much fat on someone's fingers or toes. It's too far from where it can be converted, and since those parts move quite frequently its too hot to efficiently store energy there. For this reason midsection fat is one of the last places your body will use fat from. It's too efficient of a storage area. And while you cannot spot reduce. If you can keep the midsection warmer than other parts of your body. It will be a less likely place to store it. But if you meet the conditions for fat storage your body will just put it somewhere else close enough like on your back, back of your arms, inside of your thighs, etc. The conditions for fat storage are 1. calories in excess of your base metabolic rate (which can be guestimated by 15 calories x each lb of bodyweight if you are relatively active and as low as 12 or 10 multiplied by bodyweight if you are sedentary) and 2. insulin in your bloodstream. Taking in excess of what your body can process and having insulin present in your bloodstream are your body's only requirements for fat storage. That is the main reason why low carb or ketogenic diets are so popular. They limit the amount of insulin your body has so that you can't store fat. Your body can't store fat without insulin. Women have a propensity to storing more fat than men because of estradiol ( a potent form of estrogen) that is converted in peripheral fat. more fat=more estrogen=more fat etc. Every pound of fat on the human body is equal to approximately 3500 calories. To lose 1lb of fat you must simply go into a caloric deficit = to 3500 calories. if your BMR is 2500 calories and you take in 2000 calories for a week you will have lost 1 lb of fat. But, remember as you lose body mass your metabolism drops. The key is to spare muscle tissue which has a greater caloric need than fat. fat is easy to store and muscle is difficult to store. You need to maintain muscle with protein and glycogen to keep it. Fat is pretty much stand alone :P I hope that answers your question cousinsarah


At 3:20 AM, Blogger CousinSarah said...

Whoa-ok, I do think I understood that. HOWEVER, IF fat is stored to provide me ENERGY, someone has some serious explaining to do. I havent felt rested in a LOOONG time. LOL. seriously tho' thanks for the info!

At 8:18 AM, Blogger Queue said...

ummm somebody asked you that? in Blogworld? weeellll will wonders never cease!

At 3:25 PM, Blogger Queue said...

ummm.. can I get a new post?


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