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  • Ideal BMI For Elderly Females | Backed By Research
July 24, 2022

As we age, our bodies change. Our muscle mass decreases, we lose bone density, and our metabolism slows down. All of these factors can impact our weight. So, does that mean that the BMI chart doesn’t work for older adults?

Body Mass Index (BMI) is a measure of body fat based on height and weight that applies to both adult men and women. BMI is used as a screening tool to identify possible weight problems in adults. However, BMI may not accurately measure body fat in older adults, particularly those who have lost muscle mass.

For elderly females, their ideal BMI range is slightly different from others due to natural changes in hormones and other age-related factors. This ultimate guide will discuss BMI, how to calculate it, and the ideal BMI for elderly females.

What Is BMI?

Body Mass Index (BMI) is a measure of body fat based on height and weight that applies to both adult men and women. BMI does not measure body fat directly, but research has shown that BMI is correlated with more direct measures of body fat, such as skinfold thickness measurements, bioelectrical impedance, underwater weighing, dual-energy x-ray absorptiometry (DXA), and other methods.

BMI can be used as a screening tool to identify possible weight problems in adults. However, BMI may not accurately measure body fat in older adults, particularly those who have lost muscle mass.

How To Calculate BMI?

Body Mass Index is calculated by dividing your weight in kilograms by your height in meters squared.

BMI= Weight in kg / (Height in meters x Height in meters)

For example, if you weigh 70 kg and are 1.75 m tall, your BMI would be 22.9.

You can also use our BMI calculator to work out your BMI.

How Does BMI Affect Elderly Females?

Elderly females are often the most vulnerable to changes in BMI. This is because they are more likely to experience age-related sarcopenia, which is the loss of muscle mass. Sarcopenia can lead to frailty, falls, and fractures. Additionally, elderly females are also at a higher risk for osteoporosis.

BMI can also affect elderly females’ mental health. A study found that obese older women are more likely to suffer from depression than their normal-weight counterparts. The study’s authors suggest that the higher rates of depression may be due to the physical limitations and social isolation often accompanying obesity.

BMI For Elderly Females

What Is Ideal BMI For Elderly Females?

The ideal BMI for elderly females is still a matter of debate. Some experts believe a higher BMI may protect against age-related frailty and sarcopenia. Others argue that a lower BMI is best, as it reduces the risk of obesity-related health problems such as type 2 diabetes, heart disease, and certain types of cancer.

Study Evaluating Healthy BMI For Women In Seventies

The World Health Organization (WHO) recommends a body mass index (BMI) of 18.5-25 kg/m2 for optimal health. Still, this study finds that a slightly higher BMI range may be better for older women in terms of osteoporosis and mortality risk. The study looked at data from 11,553 women aged 70-75 years over 12 years and found that while the WHO recommendation was appropriate for diabetes, hypertension, heart disease, and hospitalization risk, a slightly higher BMI was associated with a lower risk of osteoporosis and mortality.

These findings suggest that the optimal BMI range for older women may be slightly higher than recommended. Also, this study only looked at associations, not causation, so further research is needed to confirm these findings.

Dangers of Low Body Weight

The health risks associated with being underweight are significant. They include:

  • Osteoporosis: This condition causes bones to become thin and brittle. It’s more common in women than men, and underweight people are at an increased risk.
  • Anemia: This is a blood disorder caused by not having enough iron in your diet. It can lead to fatigue and weakness.
  • Malnutrition: This is a general term for not getting enough nutrients. It can cause many problems, including muscle wasting, organ damage, and an increased risk of infection.
  • Weak Immune System: Underweight people are more susceptible to infections and illnesses.
  • Elderly women who are underweight are also at an increased risk for frailty. Frailty is a condition marked by weakness, exhaustion, and an increased vulnerability to injury.

A study published in 2014 found that having a BMI below 23 or above 33 is linked with an increased risk of death for older adults. Several other studies have found that being underweight at age 65 is linked to poor health and shorter life expectancy. Being overweight or obese at 65 rarely leads to worse health outcomes or lower life expectancy. So, there is a need for weight loss for ideal health status.

In some cases, being overweight or obese confers a better health-related quality of life factors in older adults compared to those who are at a healthy weight. However, this does not mean that older adults should actively seek to gain weight, as being overweight is still linked with serious health problems that can interfere with independence.

BMI For Elderly

Weight Maintenance Goals

Older adults’ weight management goal should be to maintain a healthy weight. There are several ways to achieve and maintain a healthy weight as you age:

  • Eating Healthy Diet: This includes eating plenty of fruits, vegetables, whole grains, and lean proteins. It also means limiting processed foods, sugary drinks, and excessive amounts of saturated and unhealthy fats.
  • Being Physically Active: Physical activity is essential for overall health and can help you maintain a healthy weight. Aim for at least 30 minutes of moderate-intensity activity on most days of the week. This can include walking, biking, swimming, or any other activity that gets your heart rate up and makes you break a sweat.
  • Staying Hydrated: Drinking plenty of fluids, especially water, is important for health at any age. But it’s especially important as you get older because dehydration can lead to problems such as confusion, falls, and hospitalization.

If you’re struggling to maintain a healthy weight, talk to your doctor about ways to improve your diet and increase your physical activity level. They may also recommend supplements or medications to help you reach or lose weight and maintain a healthy weight.


With a healthy BMI, elderly females can enjoy a better quality of life and improved health outcomes. Maintaining a healthy weight reduces the risk of chronic diseases and can help manage existing conditions.

Age, height, genetics, and lifestyle choices can influence BMI. Making small changes to diet and activity level can significantly impact BMI.

Elderly females should talk to their doctor about their ideal weight and how to maintain a healthy BMI. By working together, they can develop a plan that fits their individual needs and health goals.

BMI Calculator