How to choose a connected scale

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Equipment reads vital data, such as total water and fat in the body, and synchronizes data with the cell phone. It is recommended to have professional follow-up to interpret the information. Shopping Guide: connected scales Veronica Medeiros/g1 The connected scale is the advanced version of the device that is in the bathroom at home. With additional features, it sends data via bluetooth to an application on the cell phone, to record weight and other collected data. The devices also make a measurement of bioimpedance on the body of those who use them. This means that, with the help of a very weak electric current (no risk of shocks), the scale can measure items such as visceral fat, body water and lean mass, among other information. It even calculates your body mass index (BMI). Despite offering important data about the body of each one, it is recommended to have specialized professional monitoring to understand the numbers provided by the application. Other guides: ELECTRIC KETTLE: know if it’s worth having a device just for boiling water INDIVIDUAL BLENDERS: test with three devices to make a shake TIKTOK BOTTLE: 2 liter model is the most fashionable product ALL GUIDES The Shopping Guide selected 7 models of connected scales. These appliances have the same look but are slightly more expensive than traditional bathroom versions. Prices, consulted in online stores at the end of April, started at R$ 120 and reached R$ 750. A conventional scale costs around R$ 70. See the products below and, at the end of the report, the tips on what to pay attention to when buying. Black + Decker BK75-BR The Black + Decker BK75-BR bioimpedance scale is a model with four electrodes and a digital display. It can measure 10 different pieces of information, such as body mass index (BMI), body and subcutaneous fat rates, muscle and bone mass, water, visceral fat, physical age and basal metabolic rate. The product works with 3 AAA batteries, allows you to record data of up to 8 people and has a capacity of up to 150 kg. In online stores in April, the model cost R$ 350. Geonav Balança Inteligente Geonav Balança Inteligente is a model that, according to the manufacturer, collects data on 16 different parameters, divided into three categories (health indexes, body basic indicators). The equipment has four electrodes, supports up to 180 kg and works with three AAA batteries. The app supports up to 10 family members and syncs information with third-party services such as Apple Health and Google Fit. The scale was sold for R$ 180 in internet stores in April. Huawei Scale 3 Huawei Scale 3 can assess 11 health indicators, such as weight, BMI, fat-free mass, skeletal mass and also the only one with heart rate measurement. The scale uses bluetooth and also wi-fi connections. In this way, says the manufacturer, it is not necessary to open the application on the cell phone. The device sends the information to a branded online service that stores the synchronized data. The model works with 4 AAA batteries and has a weight limit of 150 kg, with four electrodes. The app works with up to 10 users. Its price in April was R$250 in the main online stores. Kaboom! Smart 500 KaBuM! Smart 500 is a bioimpedance scale measuring 13 body indicators, such as weight, fat percentage, water percentage and visceral fat index. According to the manufacturer, a “baby” mode allows you to monitor the weight of small children. The model works with 3 AAA batteries, has four electrodes and supports up to 180 kg. The application allows you to create up to 10 user profiles. The scale cost R$ 120 in stores consulted on the internet at the end of April. Relaxmedic Smart Digital The Relaxmedic Smart Digital scale measures, in conjunction with the app, 13 body indicators, including BMI, muscle mass and metabolic age. It also has a “baby mode” to weigh children in a parent’s lap. Allows you to create up to 24 user profiles. It is a model with 4 electrodes and works with 2 AAA batteries. Its maximum weight limit is 180 kg. The product cost BRL 280 in online stores in April. Relaxmedic Digital App The Relaxmedic Digital App is the most expensive device on the list – it cost R$750 in the stores surveyed in April. – and the one with the most electrodes: there are eight (4 on the scale and 4 on the hand bar). The model measures 12 different pieces of information, including BMI, metabolic rate and body age. It also offers “baby mode” for weighing infants on a parent’s lap. The scale works with 4 AAA batteries, holds up to 180 kg and stores up to 24 user profiles. Xiaomi Mi Body Composition Scale 2 With 13 body measurements, the Xiaomi Mi Body Composition Scale 2 allows weighing both people (up to 150 kg) and objects (from 100 grams), with dynamic and static modes. It also offers features for weighing babies and assessing body balance. The device works with 4 AAA batteries and stores up to 16 user profiles, with a way for visitors to check their weight without changing the stored data. The scale cost BRL 250 in online stores at the end of April. What to pay attention to when buying: WHAT IS BIOIMPEDANCE: The measurement takes place when you step on the electrodes (the metal parts) at the base of the domestic connected scale. “An imperceptible electric current passes through the body, generating a stimulus through the water in the tissue and assessing the amount of fat”, explains Professor Enrico Fuini Puggina, from the School of Physical Education at USP Ribeirão Preto. This current does not shock. Scales use a standardized formula based on population data to arrive at body density data. WHAT DATA MEASURED: Key items may vary between models, but typically include weight, body fat and water, level of overweight, visceral fat index, lean, muscle and bone mass, protein and basal metabolism rates. Based on the information provided by each user, the app also calculates the body mass index (BMI), indicates the ideal weight and even says what is the metabolic age of each person. DO YOU HAVE A RIGHT TIME TO WEIGHT YOURSELF? according to Professor Puggina, no. But it is recommended to have an empty bladder and intestines, preferably without consuming liquids beforehand, and to avoid alcohol and coffee consumption, which can affect the results. CAN YOU WEIGHT MORE THAN ONE PERSON? Yes. The connected scales “understand” the different weights and, through the application, it is possible to configure the profiles with additional data, such as biological sex, height and age. This information helps in the overall calculation. The total number of user profiles also varies between devices. ELECTRODES AND FEATURES: Most connected scales come with all four electrodes in the base. More expensive models come with five or more electrodes – part on the scale and the rest on a bar to hold with your hands, attached by a wire. All synchronize data via bluetooth with the cell phone. The exception on the list is Huawei, which also uses Wi-Fi and sends information to an online service. The number of items evaluated in the bioimpedance measurement also varies between scales, between 10 and 16 in the models on the list. HOW TO READ THE DATA: the recommendation for evaluating the information provided by the connected scales, says the USP Ribeirão professor, is to consult specialists such as endocrinologists, nutritionists and physical education professionals. “Each one thinks according to their knowledge. Physical education, to maintain or modify the body structure, the nutritionist, in diet, the doctor in health aspects, whether an endocrinologist or cardiologist, for example”, says Puggina. Data measurement using bioimpedance can also be done in gyms and with medical specialists, using more sophisticated and accurate equipment. Another recommendation is not to be scared by the information coming out of the app – such as visceral fat alerts, the level of overweight or the BMI value. Professionals will know how to interpret this data. A bodybuilder, with a lot of lean mass, can be considered obese only by BMI, since the information that comes out of the app can be distorted by data based on general population information. This report was produced with complete editorial independence by our team of journalists and specialized collaborators. If the reader chooses to purchase a product from the links provided, Globo may earn revenue through commercial partnerships. We clarify that Globo does not have any control or responsibility over the possible shopping experience, even from the links provided. Questions or complaints regarding the product purchased and/or the purchase, payment and delivery process should be directed directly to the responsible retailer.

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