Smart gadget owners often face a situation where the device produces many numbers, the value of which is not always obvious without a detailed study of the instructions. Xiaomi Mi Body Composition Scale or the more advanced Mi Scale 2 model can measure not only weight, but also up to 13 different parameters of the body. Understanding this data is critical for those who monitor health, exercise or undergo weight correction.
The basic principle of operation of these devices is based on the method of bioimpedance analysis (BIA), through the feet of the user is a weak, absolutely safe electric current, whose resistance is measured in real time, different tissues of the body conduct electricity at different speeds, which allows the Mi Fit or Zepp Life algorithms to calculate the composition of the body with high accuracy, but the interpretation of the results requires understanding of physiological norms.
In this article, we will take a closer look at each indicator you see in the app after weighing, and learn how to distinguish between normal and abnormal, why fluctuation is normal, and what parameters should be considered first when building a training process.
The principle of operation of bioimpedance analysis
The technology behind Xiaomi's smart scales is called bioimpedansometry. The electrical signal passes through the body and meets different resistances: muscle tissue that contains a lot of water and electrolytes conducts current well, and fat tissue conducts current much worse. Based on this resistance and the data you input (height, age, sex), a mathematical model of the body is built.
It's worth noting that the accuracy of the measurements depends on the conditions of the procedure. If you just got out of bed or, conversely, had a good lunch, the indicators can vary significantly. Xiaomi algorithms are calibrated to the average user, so for professional athletes the error can be higher.
⚠️ Attention: Bioimpedance analysis is contraindicated in people with pacemakers and other implanted electronic devices, as electric current can disrupt their work.
To get the most reliable results, it is recommended to weigh yourself at the same time of day, preferably on an empty stomach in the morning, after using the toilet and before drinking water, this minimizes the influence of external factors on the electrical conductivity of tissues.
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Weigh yourself barefoot and make sure that the feet fit tightly to the metal contacts on the surface of the scales for the correct passage of the signal.
Base weight and BMI: the foundation of the assessment
The first and most obvious parameter is total body weight, but for Xiaomi’s smart scales, it’s just a starting point, and based on weight and height, Body Mass Index (BMI) is automatically calculated, a measure that has long been considered a major health marker, but modern dietetics treat it with caution.
BMI doesn't distinguish between muscle mass and fat mass, and a person with a developed muscle can have a BMI in the obese zone while remaining perfectly healthy, so you shouldn't rely on that figure alone, especially if you're actively attending the gym.
| BMI category | Value range | Recommendations |
|---|---|---|
| Weight loss | less than 18.5 | Consultation of a doctor, mass recruitment |
| Norma. | 18.5 – 24.9 | Maintenance of the current regime |
| Overweight | 25.0 – 29.9 | Adjustment of nutrition, increased activity |
| Obesity | 30.0 and higher | Professional assistance is needed |
Xiaomi scales use the standard Quetle formula to calculate BMI. If your score is outside the norm, the app will offer personalized recommendations, but they are general in nature.
Percentage of fat and muscle mass
One of the key parameters that users track is body fat percentage, which is the measure, not the weight on the scale, that determines the relief and fitness, and in men, 10-20% is the norm, in women, 20-30% is due to physiological characteristics.
In parallel, muscle mass is measured, and the increase in this indicator at a stable or declining weight indicates a qualitative transformation of the body. Xiaomi scales also secrete skeletal muscle mass, which is important for assessing physical potential and metabolic rate.
- 💪 Skeletal muscles: responsible for movement and burning calories at rest.
- 🧬 Visceral fat: Dangerous fat around internal organs, the level of which should be minimal.
- 💧 Water in the body: an important parameter that affects electrical conductivity and overall well-being.
When you change your diet dramatically, your rates can jump, for example, a low-carb diet can quickly remove water, which scales can be misinterpreted as muscle loss, so it's important to track your long-term performance, not just from one dimension.
⚠️ Do not panic if after intensive training the scales show a decrease in muscle mass - this is a temporary change in tissue hydration, not a real loss of muscle.
Metabolic age and basic exchange
Metabolic age is a measure of metabolic rate in your body compared to the average for your calendar age, and if your metabolic age is less than real, that's a great sign: your body is working efficiently and young.
Basic metabolism (BMR) shows the amount of calories your body uses at rest, the energy it needs to run your heart, lungs and brain, and knowing this figure helps you make your diet smart: a calorie deficit relative to BMR will lead to weight loss, and a surplus will lead to weight gain.
How to increase the basic exchange?
Xiaomi scales calculate this parameter based on formulas that take into account sex, age, weight and body composition. As you age, your metabolism naturally slows down, but an active lifestyle allows you to maintain high values for many years.
Water balance and bone mass
The normal water content of an adult is 50-60%, and scales measure this indirectly through impedance, and dehydration or swelling can significantly distort the results of the weighting, making them unsuitable for analysis of progress.
Bone mass is another important, though less dynamic, measure of bone mineral density, and a dramatic drop in bone density may signal a risk of osteoporosis, but scales are not a medical device for making such diagnoses.
- 🦴 Bone mass: Depends on weight and height, usually 2-4 kilogram.
- 📉 Dynamics: bone mass changes slowly, sharp jumps are the error of measurement.
- 🥛 Nutrition Effects: Adequate intake of calcium and vitamin D supports this indicator.
To correctly map the percentage of water, it is important to drink enough fluids throughout the day. Chronic dehydration causes the body to store water, which can lead to paradoxical weight gain and swelling.
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Stable hydration is key to accurate measurements of bioimpedance, so drink water evenly throughout the day, rather than slamming before weighing.
Error frequency and influence factors
Sometimes users are faced with a situation where the scales show an error or the data looks illogical, often due to a violation of the measurement technology, for example, if you stood on the scale in your socks or if your feet are dry and cold, contact with the electrodes will not be enough.
Also affected by alcohol intoxication, women's menstrual cycle, taking diuretics or recent sauna visits, in which case Xiaomi's algorithms may give incorrect body composition data, although the total weight will be correct.
If the scales show a measurement error, try rubbing your feet with a wet towel or simply standing on them with bare feet, ensuring that the entire surface of the foot is in close contact with metal, sometimes resetting the scales by removing and re-installing the battery.