Role of BMR

 

  Obesity has reached epidemic proportions globally and is a major contributor to the burden of chronic diseases. It means nothing but the generalized accumulation of excess fat in the body. The carbohydrates (glycogen) and protein stores in the human body are limited. Increased fat intake, on the other hand, does not stimulate fat oxidation; thus, long- standing positive fat balance results in obesity.

BODY MASS INDEX

If we see scientifically, obesity is expressed in terms of BMI (Body Mass Index)

BMI=weight in kilogram/ [height in meters]2

Normal value for men ranges from 20-25 and in women, 19-24. A BMI over 25 is distinct obesity.

There are so many factors which affect our metabolism and once the BMR gets sluggish, there is tendency to accumulate the fat in the body. Following are the major factors which affects our BMR

1. Exercise:

Exercise is the biggest factor which influences the BMR. During any workout, our body works hard to supply enough energy to the muscles due to increased work load placed on the body.

In certain exercise such as heavy resistance our BMR remains elevated for longer duration even after the exercise is ceased results in more calorie burned.

2. Muscle Mass:
Muscles are one of the most important factor that help to keep the BMR high. The more muscles a person has, the greater the demand for energy, and the higher the BMR.

This is the reason why Body builders eat more, still it does not accumulate the fat in the body. Hence we need to include resistance training into our weekly workout schedule.

3. Diet:

Diet is the most important factor in maintaining your metabolism or loosing the weight.
It is said that if we reduce our calorie intake below 1000, our BMR can be reduced by as much as 30%. Hence we need to avoid fasting and feasting also.

4. Hormone:

Thyroxin is one of the most important hormone which is secreted by Thyroid gland. It influences the BMR such that a higher level of secretion leads to greater BMR and lower level of secretion leads to sluggish BMR.

5. Age:

As we grow older our metabolic rate becomes slower. This is because we have a natural tendency to become less active thus compounding the effect of ageing.

6. Gender:

Males have a higher metabolic rate than females. This is due to higher elevation of the testosterone hormone and greater muscle percentage as compared to females.

7. Body Temperature:

As our body temperature increases, the rate at which our body use energy increases.

1% increase in body temperature can elicit an increase in BMR in the range of 10%

(Tortora and Grabowski; 1993)

Hence here i would like to suggest that one should be active and keep the BMR in normal range so that the body does not get a chance to accumulate excess fat.

Doctor Vista Healthcare Resource

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