Body Fat Percentage

Body fat percentage indicates what proportion of total body weight is fat tissue. It is a considerably better indicator than weight or BMI because it reveals the body's true composition - body composition determines appearance and health, not just the number on the scale. For example, a 70 kg woman with a body fat percentage of 25% has 17.5 kg of fat mass and 52.5 kg of lean mass (muscles, bones, organs, water). Two people of the same weight can look completely different if one has 20% body fat and the other 35%.

Healthy body fat percentages differ significantly between women and men. For women, healthy reference values are: essential fat 10-13%, athletic 14-20%, normal healthy 21-24%, acceptable 25-31%, and obesity over 32%. For men, the corresponding figures are: essential fat 2-5%, athletic 6-13%, normal healthy 14-17%, acceptable 18-24%, and obesity over 25%. Body fat percentage in women is naturally higher because women's bodies need more fat for breast tissue, uterine protection, and hormone production. In women, body fat below 15% disrupts estrogen production, can stop menstruation (amenorrhea), weakens bone health, and affects fertility. In men, similar health risks begin below 5-8%.

Excessively high body fat - especially when fat accumulates in the abdominal cavity (visceral fat) - significantly increases the risk of type 2 diabetes, cardiovascular disease, elevated blood pressure, and certain cancers. Health risks depend not just on weight but specifically on the amount of fat and its location in the body.

Body fat percentage can be measured using several methods, each with its strengths and weaknesses. DEXA scanning (Dual-Energy X-ray Absorptiometry) is the most accurate method with a 1-2% margin of error, and it also distinguishes fat distribution across different body parts. It typically costs 80-150 euros. Bioimpedance scale (BIA) is the most affordable home option (30-200 euros), but its reading varies with hydration, meal timing, menstrual cycle, and even skin temperature - use it for trend tracking, not as an absolute number. Skinfold measurement (calipers) is reliable if the tester is experienced, and costs only a few euros per measurement. Hydrostatic weighing (underwater weighing) is as accurate as DEXA but rare. Visual estimation using comparison photos is free and surprisingly useful for getting a rough estimate.

Factors affecting body fat percentage are largely the same as in weight management generally: energy balance, diet quality, exercise, sleep, stress, and hormones. Women's body fat percentage also varies with the menstrual cycle and menopause - declining estrogen during menopause increases fat accumulation particularly in the abdominal area.

Body fat percentage can be lowered effectively by combining several approaches: 1) Moderate calorie deficit (300-500 kcal below TDEE) burns fat without putting the body into conservation mode. 2) Adequate protein (1.6-2.2 g/kg/day) protects muscle mass during weight loss - without sufficient protein, up to 25-30% of weight lost can be muscle rather than fat. 3) Strength training 2-4 times per week preserves and builds muscle mass, which raises basal metabolic rate and improves body composition. 4) Sufficient sleep (7-9 hours), because sleep deprivation raises cortisol and ghrelin, which promote fat accumulation. 5) Stress management, because chronic stress increases visceral fat accumulation.

It's important to understand that you cannot reduce body fat from a specific area (the so-called spot reduction myth). You can't burn belly, thigh, or arm fat with targeted exercises alone - the body burns fat holistically, and fat distribution is largely determined by genetics and hormones.

Practical tip: always measure your body fat percentage at the same time of day, under the same conditions (morning, empty stomach, before exercise). Track the monthly trend rather than individual measurements. Even a 2-3 percentage point drop in fat is clearly visible in the mirror and in how clothes fit. Body fat percentage is closely related to body composition, muscle mass, and BMI concepts.

Last updated: March 30, 2026