Is your metabolic age older than YOU are?

Do you know your BMR?
on Thu 10 Sep

Would it help you to know how many calories per day your body actually needs so that you can more consciously plan a way of losing weight?


There is a way of doing this and it’s to do with something called Basal Metabolic Rate or BMR. This is defined as the basic amount of energy your body requires to keep you alive and is expressed in calories 


  • BMR changes according to our age. When we are children our bodies need more energy because of our rapid growth and the extra energy needed to maintain our body temperature.


Our BMR eventually peaks around the age of 16 or 17 and then typically starts to decrease.  Older adults will have a lower BMR because muscle mass decreases with age and there are additional hormonal and neurological changes


Men have a higher BMR than women as they tend to have a larger overall body size and lean mass levels. This is significant as a pound of fat burns 2 calories per day and a pound of muscle burns 6 calories per day.


So the fitter, healthier and stronger you are the lower your BMR will be because you have an efficient metabolism.  There is a recognised average BMR so your “metabolic age” is calculated by comparing your BMR to those of the same chronological age.


Further factors that affect our BMR

Our BMR is influenced by multiple factors – we talked about age and gender above but also: 


  • The leaner our muscle the more quickly it burns the calories
  • Fat cells burn less calories than most other tissues and organs of the body
  • If we crash diet or starve our body is encouraged to conserve energy by slowing the metabolism. This is why it is not the way to lose weight.
  • You BMR may be partly decided by your genes.
  • If we have any hormonal imbalances this will affect how quickly or slowly our bodies can burn calories
  • If we’re working in a hot or cold environment our bodies have to work harder to maintain our normal core temperature which will increase the BMR
  • If we are unwell or fighting of infection our BMR will increase because our bodies are required to  work harder to build new tissues and to create an immune response.
  • Hard-working muscles need plenty of energy to burn. So doing regular exercise not only helps you to increases muscle mass but also teaches your body to burn calories at a faster rate, even when at rest!
  • Stimulants can increase the BMR.


 Let’s talk about how many calories you actually need

 Around 70% of your calories are consumed by your body just to keep it functioning - they are fuelling your breathing, the circulation of your blood and the function of your organs. So just how many calories is this?


According to the British Nutrition Foundation the average daily energy intake of British adults is 2313 kcal for men and 1632 kcal for women


How many calories is YOUR body probably burning each day?  There are fortunately calculators which indicate this by using your age, weight, height and daily level of activity.  Like this one:



Of course, knowing your BMR means that you are better equipped to maintain a healthy metabolism as well as to lose weight. However being sufficiently motivated to achieve this is usually quite challenging.  I will discuss how this might be improved in my next blog post 


We make every effort to ensure that all health advice on this website is accurate and up to date. However it is for information purposes and should not replace a visit to your doctor or health care professional. As the advice is general in nature rather than specific to individuals we cannot accept any liability for actions arising from its use nor can we be held responsible for the content of any pages referenced by an external link.


About Stephanie Acne Age-related Macular Degeneration AIDS alcohol units and effects allergies Andropause angina anorexia Anti Ageing Anxiety arrhythmia arthritis asthma atrial fibrillation back pain basic metabolic rate BHRT bio-identical hormones Biog Bloating blood pressure BMR bone density Book review bowel cancer brain fog brain tumour Bronchitis bulimia Bursitis calcium Cancer cancer signs and symptoms carpal tunnel syndromw cervical cancer Cervical smear Charles Bonnet Syndrome check your pulse cholesterol chronic fatigue syndrome coeliac disease cold virus contraception COPD coronary thrombosis coronavirus covid-19 Deep vein thrombosis dehydration signs Delaying menopause Dementia Depression dermatitis Diabetes Digestive problems digital health Donor advice DVT dyspareunia Ear infections Early menopause eating disorders eczema endometriosis exercise fertility fibroids fitness flu gallstones Gardisil Genetic testing government health policy hair loss hayfever Health Awareness Day Health Awareness Month Health Awareness week health warning healthy eating heart attack heart attacks Heart Disease Helpful supplements Hepatitis High blood pressure HIV Hives Hormone Replacement Therapy hormones hot flushes HPV HRT HRT & breast cancer HRT in the news HRT risks hydration benefits Hypertension IBS immune system itching Itchy Skin joint pain kidney function Laryngitis Leukaemia libido lichen sclerosus lifestyle liver Liver Disease Long Covid Symptoms lowered immmunity Lung cancer Lupus LUTS Macular Degeneration Magnesium# Male Menopause Managing Anxiety Managing Stress ME/CFS Men's health Meningitis Menoapuse advice for partners menopause menopause and dental health Menopause Specialist menopause symptoms Menopause Weight Gain menpause Menstrual Cycle Menstruation Menstruation and Athletes mental health Mental health support metabolism microbiome Migraine Migraines Motivation technique mouth cancer night sweats Norovirus oestrogen osteoarthritis Osteoporosis Paget's disease painful sex palpitations Pancreatic Cancer Parkinson's Parkinsons pelvic pain Perimenopause perimenopause and breast pain Pneumonia POI post menopause vocal syndrome Premature Ovarian Insufficiency Probiotics Prolapse prostate prostate cancer Pruritis Psoriasis Psychosexual medicine reflux rheumatoid arthritis Rosacea sarcoma self harming sex sex and disability sexual health Shingles Sinusitis skin cancer Skin health sleep Statins Staying positive STI's Strep A Strep throat stroke Takayasu Arteritis talks and presentations TB testosterone Tinnitus trying to lose weight tuberculosis Type 2 Diabetes underactive thyroid Urinary Infections Urinary Tract Infection Using a private GP UTI's vaginal dryness Vascular awareness month vegan diets Vitamin D Vulval itching Winter Vomiting Bug women's health World Health Day

Email enquiry form

How To Find Us

25 Harley Street, London W1G 9QW

Newsletter Signup

You can unsubscribe at any time by clicking the link in the footer of our emails. For information about our privacy practices, please visit our website.


We use MailChimp as our marketing platform. By clicking below to subscribe, you acknowledge that your information will be transferred to MailChimp for processing. Learn more about MailChimp's privacy practices here.