What You Need To Know Is Age And Gender Affect Your BMR

What You Need To Know Is Age And Gender Affect Your BMR

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Do age and gender affect BMR?

In BMR, gender is an important determinant; in this, men have a greater BMR than females after adjustment for body composition. BMR also decreases with advancing age in sedentary populations at 1 to 2% a decade after age 20. The BMR is greatest during the first few years of life. The difference is marked in older age groups.

Some of the factors influencing BMR are:

  • Sex
  • Age
  • Sleep 
  • Body Temperature
  • Endocrine glands
  • State of Nutrition
  • Pregnancy
  • Climate


Women have a 6% to 10% lower basal metabolic rate than men. The influence of sex hormones accounts for the difference.


For the first two years of life, your BMR rate is higher; it declines throughout childhood and accelerates in adolescence. The rapid growth rate defines the high metabolic rate in early childhood.


BMR is 10% lower than in the waking state compared to sleeping hours.

Body temperature

The body temperature increases basal metabolism by 13% for each degree centigrade. 

Endocrine glands

The thyroid gland regulates the rate of energy metabolism, and a change occurs in thyroid activity reflected in the metabolic rate. 

State of Nutrition

When the person is undernourished, body tissue is destroyed, lowering the basal metabolic rate.


There is an increase in BMR during Pregnancy and lactation. It increases from 15% to 25% during the last trimester. This increase can account for an increase in women's weight and a high metabolism rate.


The basal metabolism increases or decreases depending upon the climatic conditions. 

Three things that make up the BMR

The number of calories you burn can change by the following:

  • Basal metabolic rate is the number of calories your body uses to maintain vital functions such as heart rate, breathing, and brain function.
  • Thermic effect of food (TEF)
  • Thermic effect of exercise (TEE)
  • Non-Exercise activity thermogenesis (NEAT)

With a higher BMR, you need to burn calories to sustain yourself throughout the day. This will lead you to have a healthy lifestyle, exercise, and eat well. Men have a BMR of about 1600 to 1800 kCals a day. Women have a BMR of 1500 kCals a day. 

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