Wednesday, February 15, 2006

Why Do We Get Fat As We Get Older?

We get heavier as we get older. And if that's not bad enough, we women suddenly find ourselves growing a "beer" belly without even having to imbibe (you'd think we were sufficiently punished by the portly thighs and butt we sported during our reproductive years!). Why? Can we do anything about it? Rich Fitter, A.C.E., explains the reasons for the encroaching weight gain and describes ways we can prevent it --


Most people have heard that our metabolism changes after we hit the big 3-O. The reasons why, and what we can do about it is often misunderstood. After the age of 30, the average person begins to lose 1/2 lb. of muscle per year. This condition is called Sarcopenia, the age-related loss of muscle. One reason for this is related to the loss of nerve stimulation to the muscle and decreased protein synthesis (a necessary process for muscle development). Other factors include dietary changes such as dieting, under-eating, poor nutritional choices, hormonal changes and decreased physical activity. Muscle is a very active tissue – much more active than fat tissue. In some instances one pound of muscle may burn up to 500 calories per week. As we lose muscle and gain fat, therefore, we automatically gain weight, unless we do something different to challenge our body and improve our diets.
While it is possible through proper nutrition and strength training to continue to build muscle well into later life, Mother Nature requires we work at it. Let's say at age 30 a woman gets into the best shape of her life. Her diet is perfect and she exercises regularly. She then decides she will keep doing the same things for the rest of her life, expecting to stay in perfect shape because of it. The following year, 31 rolls around and she loses 1/2 lb of muscle. The year after that, another 1/2 lb is lost, and so on. Even though this person is doing the same things she did at 30, by the time she hits 38, she will have lost 4 lbs of lean muscle and her body will be burning 2000 calories less per week. One pound of fat contains 3500 calories. Because this woman's body is burning this many calories less every 10 days, in a one year period she may gain approximately 30 lbs of fat!

Performing her same exercise program over and over for years is not effective in halting this weight gain because your body has not only adapted to it, but has also increased its need for greater challenges. Following the same eating patterns also is not logical because your needs for calories and nutrients are also different as you get older.

The Solution – Avoid Very Low-Calorie Diets and Do Challenging Strength Training Programs -- Overall, the factors that most affect a person's metabolism are age, gender, size, body composition (fat to lean mass ratio) and physical activity. The above-mentioned factors minus our physical activity determine our resting metabolic rate. Our resting metabolism is the number of calories our bodies expend performing the most basic physiological functions such as breathing, temperature, circulation and respiration. Surprisingly, our body uses about 65% of our daily calories doing just these necessary tasks. This is one of the primary reasons very low calorie diets do not work well for losing body fat. You need to provide your body with adequate calories for energy and nutrients to perform at the very least these functions. If you fail to do this, your body will fear starvation and lower its heart rate, respiration and temperature to burn less calories. In the absence of proper nutrients your body will feed off of its own muscle and bones, further slow metabolism and contribute to muscle loss. Depriving your body of calories and nutrients is not the answer.
A challenging and varied weight training program, in combination with good diet, helps to prevent muscle loss as well as increase protein synthesis and metabolism. Overall, proper eating and increased physical activity is the answer to life long fitness and wellness.

Author:
Rich Fitter, A.C.E. Certified Trainer, Weight Lifting Champion, WNBF Body Building Champion, is an expert consultant to TheFitWoman.com, a website of fitness equipment and weight training for women.

1 Comments:

Blogger Sreenivasa S said...

Hi you have got a good info on your blog which is worth reading, even I have a Muscle toning related website and blog. I should say good job done

4:56 AM  

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