WHR index
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The WHR (Waist-to-Hip Ratio) index is an anthropometric parameter that determines the ratio of waist circumference to hip circumference. It is one of the simplest and, at the same time, most useful tools for assessing the distribution of body fat. Unlike the BMI index, which only analyzes the relationship of body weight to height, WHR provides information about the body type and the location of excess fat tissue. This is of significant clinical importance, as visceral fat accumulating in the abdominal area exhibits much greater metabolic activity than fat tissue located within the hips or thighs. A high WHR index is associated with an increased risk of developing cardiovascular diseases, type 2 diabetes, arterial hypertension, and metabolic disorders. This parameter is used in medicine, dietetics, as well as modern body shape diagnostics.
WHR index - what is it
WHR is the ratio of waist circumference to hip circumference expressed as a simple mathematical quotient. This parameter allows determining the distribution of body fat and classifying the body shape into one of the basic types:
- android type (“apple”) – excess body fat is concentrated in the abdominal area,
- gynoid type (“pear”) – body fat accumulates mainly in the area of the hips, buttocks, and thighs.
The distribution of body fat has a greater prognostic significance than body weight alone. A person with a normal BMI may simultaneously exhibit an elevated WHR, which means an increased metabolic risk resulting from the accumulation of visceral fat.
Visceral adipose tissue surrounding the abdominal organs produces numerous pro-inflammatory cytokines and hormones affecting insulin and lipid metabolism, as well as the functioning of the cardiovascular system. For this reason, WHR is considered an important marker of metabolic health.
The index is used, among other things, in:
- the diagnosis of abdominal obesity,
- cardiovascular risk assessment,
- planning body fat reduction therapy,
- monitoring the effects of dietary and procedural treatment,
- sports and aesthetic medicine.
WHR index - how to calculate it
Calculating the WHR index is simple and does not require specialized equipment. Only a tailor's tape measure and correctly performed body circumference measurements are necessary.
The formula for WHR is as follows:
WHR = waist circumference ÷ hip circumference
The waist measurement should be taken at the narrowest part of the torso, usually between the lower rib margin and the iliac crest. In case of difficulty in locating the narrowest point, measurement at the level of the navel is recommended.
Hip circumference is measured at the widest part of the buttocks, while keeping the measuring tape horizontal.
Calculation example
- waist circumference: 74 cm,
- hip circumference: 96 cm.
WHR = 74 ÷ 96 = 0.77
The obtained result is then interpreted according to norms that take biological sex into account.
To obtain reliable results, measurements should be taken:
- while standing,
- in an upright position,
- after a quiet exhalation,
- without excessive tightening of the measuring tape,
- preferably at the same time of day.
Even minor measurement errors can affect the final interpretation of the index.
WHR index - interpretation and norms
WHR standards differ in women and men, which results from physiological hormonal differences and different distribution of fat tissue.
WHR standards in women
WHR value | Interpretation |
|---|---|
below 0.80 | low level of metabolic risk |
0.80–0.84 | moderate risk |
0.85 and more | increased health risk |
WHR standards for men
WHR value | Interpretation |
|---|---|
below 0.90 | low level of metabolic risk |
0.90–0.99 | moderate risk |
1.0 and more | high health risk |
In women, physiologically, a greater amount of adipose tissue is deposited within the hips and thighs under the influence of estrogens. In turn, in men, the android type associated with fat accumulation in the abdominal area is dominant.
The interpretation of WHR should also take into account:
- the patient's age,
- physical activity level,
- body composition,
- the amount of muscle tissue,
- coexisting metabolic diseases.
In clinical practice, the WHR index is often analyzed in parallel with:
- BMI,
- body fat percentage,
- waist circumference,
- body composition analysis using the bioimpedance method,
- laboratory parameters of lipid and glucose metabolism.
WHR index and health risk - what it says about the figure
An elevated WHR indicates an increased amount of visceral fat, which exhibits high metabolic and pro-inflammatory activity. Abdominal obesity is currently considered one of the most important risk factors for civilization diseases.
A high WHR is associated with an increased risk of:
- insulin resistance,
- type 2 diabetes,
- arterial hypertension,
- atherosclerosis,
- ischemic heart disease,
- stroke,
- metabolic syndrome,
- non-alcoholic fatty liver disease (NAFLD),
- hormonal disorders.
Epidemiological studies indicate that WHR may be a more accurate predictor of cardiovascular risk than the BMI index itself. Waist circumference and the amount of visceral fat are of particular importance, as this tissue influences chronic inflammation of the body and metabolic disorders.
In aesthetic medicine, WHR analysis is also used when planning body contouring and fat reduction therapies. Assessment of body proportions helps select the appropriate therapeutic approach, which includes:
- nutritional therapy,
- physical activity,
- fat reduction treatments,
- technologies supporting lipolysis and improving body contour.
Among the modern methods used in body contouring are, among others:
- cryolipolysis,
- microneedle radiofrequency,
- acoustic waves,
- coolwaves microwaves,
- endermologie,
- treatments using ultrasound,
- technologies stimulating lymphatic drainage and tissue metabolism.
However, it should be emphasized that a lasting improvement in the WHR ratio primarily requires the reduction of visceral fat through lifestyle changes, regular physical activity, and proper treatment of metabolic disorders.
