Are fitness bracelets harmful? Harm to health of a Bluetooth headset - symptoms and consequences from waves

Probably everyone who considers himself a supporter of a healthy lifestyle knows (and some people own this fashionable gadget) what a modern fitness bracelet is.

The peak of popularity of this useful in many respects device has already passed, however, today there are many who consider the bracelet necessary in the daily control of their body and to get the most out of training.

It is quite possible that you, having succumbed to a newfangled hobby at one time, purchased a similar fitness bracelet, but in recent months it has peacefully lived out its life in a distant drawer or chest of drawers. So was the game worth the candle, does such a gadget really help in training and self-control, or is its functionality, to put it mildly, embellished?

Perhaps this is a conspiracy of marketing companies and manufacturers who have earned tens and hundreds of millions of dollars on bracelets? Is it worth taking your old fitness bracelet out into the world again, or is it better to leave it as it is? Let's figure it out together.

The main functions of fitness bracelets. What is it needed for?

What is any fitness bracelet, what is it for and how is it used in various sports? You should not attribute supernatural and miraculous properties to this gadget, believing that as soon as you start wearing it constantly, your well-being and health will improve and reach a new level by themselves.

By the way, this is exactly what was promoted at one time by numerous scammers and unscrupulous sellers, advertising inexpensive bracelets with minimal functionality as a panacea for almost any sore.

In fact, a fitness bracelet is a rather complex and multifunctional technical device used both as a control sensor, and as an alarm clock, and as an organizer for your daily routine. It's used to measure your heart rate (some models can even measure blood pressure), to track different sleep phases, and to keep track of your daily activities.

The standard functionality of a high-quality fitness bracelet, regardless of cost and manufacturer, includes features such as:

measurement of the total number of steps (per day, per hour, per minute);
measurement of the distance traveled;
pulse control;
smart alarm;
calculation of calories burned during training;
sleep phase tracking.

What is the difference between fitness bracelets for different sports and how to choose the right device for your needs? It is important to understand what goal you set for yourself when buying such a gadget.

If you're just trying to stay active and control calories, you can pick up mid-range models with step counters, heart rate monitors and calorie counting.

Often these bracelets are practically no different from wristwatches and are perfect for any wardrobe. They are compatible with your mobile gadgets, which allows you to control the situation on the screen of smartphones based on Android or iOS.

Which fitness bracelet to choose

If you are a professional sportsman, you should consider more advanced options that allow you to not only track steps, calories, heart rate and other parameters, but also analyze your workouts for better results.

A professional fitness tracker for running, for example, can help you maintain the most optimal pace for your body.

For those who visit the pools, waterproof swimming bracelets are suitable, which can function even at serious depths. If you are looking for a weight loss assistant, you can find a model that counts calories consumed and burned. Their only disadvantage is the need for constant manual entry of the calorie content of food consumed. It takes a lot of time, however, and the results allow you to show good results in the end.

How to choose a brand or manufacturer? In this area today, there are several brands that deserve attention. First of all, these are bracelets from Xiaomi of the MiBand line, which are among the best in terms of price and quality. Training is controlled using your smartphone.

The Samsung Gear Fit model is a full-fledged smart watch with a color display that displays all the necessary information. Professional athletes often choose the Garmin brand and the popular Vivofit series. The gadgets of this line are distinguished by their minimum size, maximum functionality, and the measurement error is no more than 3-4%.

Fitness bracelets - good or bad?

Do you need or don't you need a personal fitness bracelet? Everyone must answer this question for themselves. In this business, as elsewhere, motivation is very important. Buying a fancy and feature-packed gadget and wearing it instead of a wristwatch is like using a modern smartphone exclusively for calls and text messages.

The bracelet will not force you to live a healthy lifestyle and will not work a miracle by vaporizing your extra pounds while you sleep. It is very important to understand that only your desire to change yourself for the better and achieve a certain fitness is a guarantee of success.

The bracelet in this case acts as a kind of coach and motivator. It will help to make exercises in the gym, jogging or in the pool even more productive.

Its only disadvantage for many is the unjustified expectations - we believe that the mere possession of such a gadget is evidence of the correctness of the chosen path, sometimes without making any effort to personally contribute to the improvement of your body.

So, a bracelet is a bracelet, and no one has canceled proper nutrition and constant fitness! And if you still want to look great, then take out your fitness tracker and go to: it will make your classes even more productive!

It is recommended to remember that wireless devices emit certain waves. Is the device safe or has a negative effect on the human body? What to do to protect yourself from radiation and reduce the harm of bluetooth to the human body?

Is there any harm to Bluetooth headphones for humans? There are often people on the streets who use such a headset not only for talking, but also for listening to music, audio books.

What it is

Bluetooth is a technology for wireless transmission of information. Through a special earpiece, a person receives the ability to talk, listen to music, transmit images. The small device enables continuous interaction between mobile phone, computer, tablet and even camera simultaneously or in pairs.

To use the technology, a special headset has been created that helps to obtain the necessary information.

What happens:

Dual earphones for listening to stereo music,
One earphone for talking and receiving information,
Headphone with the possibility of attaching to the ear.

The consumer is able to use gadgets not only for listening, but also for transmitting information. Small devices are convenient when traveling in a car, in any other conditions, because they do not require the help of hands.

Bluetooth headset works on a different principle than regular headphones. The electrical signal in the classic device comes directly from the source. Bluetooth technologies imply a different action - a signal is transmitted to a special radio transmitter, radio waves arise, which the receiving device of the earphone receives. The wave frequency ranges from 2.4 to 2.8 GHz.

The Bluetooth headset has gained popularity among adults and children. What are the advantages of wireless headphones?

Positive sides:

The ability to talk and do things at the same time
Ease of transferring information from different devices,
The use of devices ensures safety while driving, the driver does not have to hold the phone with one hand,
The use of devices allows you not to use the phone directly, it is possible to place the mobile at some distance from the person.

Bluetooth headset is convenient for mothers with small children, wireless devices make it possible not to be distracted from the child and at the same time answer the call.

Is bluetooth harmful? The headset is comfortable for different people and enjoys undeniable popularity. However, many medical professionals argue that prolonged use of such Bluetooth headphones can adversely affect a person's condition. The development of unpleasant symptoms and sensations is noted.

What is possible:

Prolonged use leads to impaired auditory functions. A person does not immediately notice a slight hearing loss, but in the future such phenomena can progress.
The auricle is similar to the human embryo. Impact on certain points affects the state of the whole organism (proven with acupuncture). When using a headset, electric and magnetic fields are constantly generated in the ear due to radiation. It is recommended to remember that radiation is present even when the device is turned off. The constant action of high-frequency waves is unfavorable for health.
Gradually, the headset began to be made smaller. The constant presence of the device in the ear puts pressure on the eardrum. Constantly listening to music at high volume leads to increased strain on the ear. The result is the appearance of various changes in the hearing aid.
Medical experts say that frequent conversations using bluetooth can harm. Radio waves of low intensity gradually reduce the effect of a special protective barrier. The brain gradually loses its protection from harmful influences. It is not excluded the development of diseases requiring serious treatment.

Thus, the constant use of a bluetooth headset for health does not always have a positive effect and often leads to changes in the body and the hearing aid.

People who often use wireless gadgets, after a while, the presence of headaches, the development of problems with memory and memorization are noted. It is not excluded the appearance of tumors in the ears after prolonged use of the wireless headset.

When comparing the radiation strength of a mobile phone and bluetooth headphones, it is noted that in the first case, the indicators are much higher. However, constantly wearing headphones is no less dangerous than talking on a cell phone.

Bluetooth security

New devices always go through a test and a period of adaptation in people. It is proved that the harm of bluetooth is less than from talking on a mobile phone.

The undoubted advantage of the device is the wireless method of transmitting information. The absence of wires makes the use of the device more convenient and safe for humans. This is especially true for people who often spend time behind the wheel. The use of bluetooth allows you to keep a conversation without being distracted from the road.

Reasonable use of bluetooth technology will not cause serious harm to health.

How to reduce the harm from bluetooth headsets

It is possible to reduce the possible harm of Bluetooth to the hearing aid and the brain if the headset is used correctly. Allocate rules, following which the use of gadgets will not cause problems to the owner.

Rules:

It is recommended to use the headset for several hours, not all day. Such use will not cause serious harm to the body.
It must be remembered that even when the bluetooth device is turned off, it emits radio waves, so it is recommended to remove the headphones from the ears.
When using the headset, you need to keep the phone at a distance, and not in your pocket or in your hand. In such a situation, the harm from radiation will be minimal.
When listening to music through Bluetooth headphones, it is recommended not to raise the volume too much.

The harm of Bluetooth to a person depends on the use of an electronic gadget.

Effects

The negative consequences of using bluetooth depend on the correct application. If safety precautions are not observed, it is possible to develop a violation of auditory functions, the appearance of headaches, nervousness, and mental abnormalities. In severe cases, growth of tumor formations in the ear passages, disruption of the normal functioning of the brain is possible.

Using a bluetooth headset is convenient for an active user. However, everything needs a measure, it is required to treat the use of electronic gadgets with care and caution.

Video: electromagnetic radiation

Thanks to the development of technology, a large number of different gadgets have appeared that significantly improve the quality of life. Some devices are still considered an unnecessary luxury, while others have become a must.

One of the very useful gadgets, without which it is really difficult to do, is a fitness bracelet. It can also be called a smart watch, depending on the functionality and capabilities. The device acts as an indispensable assistant, which is designed to maintain human health and organize not only physical activity, but also recreation.

Not so long ago, many people became victims of scammers who sold miraculous wrist bracelets, citing the fact that all famous people have been using their “magic” properties for a long time. According to them, they normalized blood pressure, treated diseases, and even helped to lose weight without physical activity. It is important to understand that these bracelets are completely different devices, so you should not compare them. If in the first case we are talking about an ordinary fake, which is attributed to various properties, then the fitness bracelet has completely different features.

This is a multifunctional technical device, which is not only a sensor, but also an organizer. Its capabilities allow you to measure your heart rate, track different phases of sleep, daily activity and other statistical data.

When it comes to such a complex device, it is extremely difficult to list all its functions. Moreover, some models differ in "additional features", so initially you need to consider only the basic characteristics. They are typical for all devices, regardless of price and brand. First of all, it is worth noting the following functions of bracelets:

Step meter
Heart rate control
"Smart" alarm clock
Calorie count
Sleep monitoring

To understand how such a small device can improve the quality of life, you need to take a closer look at each of its features. The first prototypes of such gadgets appeared in the form of heart rate monitors. Further, the function of measuring steps and calories burned was added to them. However, it became possible to call them full-fledged fitness trackers only when they had full integration with mobile operating systems and PCs.

Why is it important to monitor your heart rate? First of all, it allows you to make any kind of physical activity more effective. It is no secret that the control of the so-called pulse zones can significantly improve the response of the body to the load. For example, if the goal of morning jogging is to lose weight, then the pulse must be kept in the region of 130 beats per minute. A faster or slower heart rate will significantly slow down the fat burning process, because such work will be done in vain. If you do not control your heart rate, then the benefits and effectiveness of jogging can be significantly reduced, nullifying all efforts.

The most important function of the bracelet is sleep control. At first glance, this is nothing special, but the device allows you to collect statistics not only about the time, but also about the quality of rest. You can track sleep phases, which opens up completely new possibilities. For example, you can avoid oversleeping or not getting enough sleep, as well as waking up exactly when it is optimal in time. This is the merit of the "smart" alarm clock, which is in all fitness trackers. Unlike a conventional device, it will not wake up at the specified time, but based on the maximum benefit for the body. Such a function allows you to control not only the duration, but also the quality of sleep, and do it individually for each person.

The third most important function, which for many people comes out in the first place, is the control of calories burned. It is worth recognizing that most people try to keep their figure, not only for health, but also for the sake of a spectacular appearance. In order not to shake over every candy eaten, it is important to know the total number of calories that a person spent throughout the day. These data allow you to make a simple calculation and determine the norm that will always allow you to stay in shape. Moreover, the bracelet constantly remains on the arm, therefore the reliability of the information is close to 100%.

Otherwise, this indispensable gadget can track everything related to health, from the number of steps taken to the quality of sleep, and thanks to "smart" software and integration with a PC or mobile OS, you can not only receive invaluable data, but also compare them with others. .

Types and features of fitness bracelets

Although in most cases the functions of the bracelets are almost identical, there are still many different options on the market, the price of which can vary dramatically. Of course, one should not exclude the commercial side, which makes many brands compete with each other, trying to capture the market as much as possible. In order not to become a victim of marketing, you need to be able to distinguish the necessary functions from those that are added to the characteristics of the device “for show”. For example, many popular brands of such smart bracelets focus on the fact that you can not only control the amount of calories spent, but also the calories consumed.

This is certainly not a useless feature, but in reality it almost never works. The whole point is that in order to track, you must independently enter everything that you ate during the day. If a barcode scanner helps add calories from a candy or cookie eaten, then what about cereals, meats and other products? Moreover, even if you enter all the data manually, it will take a huge amount of time, because this function is rarely used to its full extent and can only impress those who want their first bracelet to be as functional as possible.

Another important advantage, which is often found in more expensive models, is PC compatibility. As a rule, cheap models, such as Xiaomi, only allow you to output data to android or iOS devices, while Polar, Nike and others can also be synchronized with a computer. At first glance, this is not such an important feature, but many users note that Windows hardware is more stable, and also has the largest number of functions (analysis, comparison of statistics, etc.).

Design also plays an important role. It is important to understand that the device must be worn around the clock, because the way the bracelet looks is an important criterion when buying. Some manufacturers often manage to combine a bracelet with a watch. Such devices look quite attractive, but the main disadvantage is that the time is displayed vertically. This feature can cause certain difficulties, but after a while you can get used to such a display on the display. Also, some bracelets have many additional features that are not always mandatory. With their help, you can control the player, add notifications and use as an organizer. But all these properties do not affect the main functions of the bracelet in any way and are just a nice addition, for which you will have to pay a fair amount.

Most Popular Models

It is worth considering the most popular models in different price segments. Perhaps this will help you make the right choice and avoid unnecessary spending where they are completely unnecessary.

Xiaomi Mi Band

The Xiaomi brand has almost burst into the market of electronic devices and has carved its niche by offering great products at a fairly low price. Despite the fact that the manufacturer is China, it is still worth noting that the fitness bracelets of this manufacturer are almost no different from the rest, and the only thing that can repel you when buying is a simple design. Also, devices do not have integration with a PC, which in some cases can be a minus, but if you are not ready to overpay for unnecessary features, then Xiaomi will be a great option.

Xiaomi Mi Band 2

Fitness bracelet XIAOMI Mi Band 2 is the best assistant for fans of regular productive workouts. This modern device is equipped with a bright informative OLED display, a convenient touch panel. Just one touch of your finger allows you to get a lot of useful information:

The number of kilometers traveled;
Time spent on training;
Heart rate (pulse);
Body temperature and other data.

Unlike its predecessor Mi Band, the "fresh" version of the fitness bracelet is based on an innovative hardware platform. Now your every step is displayed on the display of the device - thanks to this, you can easily track, vary the functional load from day to day.

Your XIAOMI Mi Band 2 is always completely safe, as its case is waterproof and dustproof. No sweat, moisture, oil will penetrate the device and cause it to malfunction.

Technical features of the bracelet:

Made of durable aluminum alloy combined with polycarbonate;
Works on Android 4.3+, iOS 7.0;
Equipped with 45mAh lithium battery;
The weight of the device is 13.5 g.

XIAOMI Mi Band 2 is synchronized with the phone using the Bluetooth system (data is received in real time). The fitness bracelet can work without recharging for as long as 30 days at temperatures from -20 to +70 degrees. This means that you can use the device all year round.

Additional features of XIAOMI Mi Band 2:

Vibrating alarm clock, taking into account the individual characteristics of the body of the owner of the bracelet - your assistant decides when it is better to start training and how long it should last;
Making calls and sending SMS messages;
"Reminder" option;
Can work in power saving mode.

Thus, the XIAOMI Mi Band 2 fitness bracelet is an affordable multifunctional portable device that will make your regular workouts as comfortable and productive as possible!

Samsung Gear Fit

Unlike the previous model, the Samsung device has a touch screen and looks more like a watch than a simple bracelet. The company positions this line more like a smart watch with fitness tracker capabilities, which only adds to its advantages. It is worth noting the main drawback of this model, and most of the bracelets in general, is a frankly weak heart rate monitor. If at rest it is able to accurately display the pulse, then during activity the values are completely distorted, due to which this function tends to zero.

Sony Smart Band SWR10

The model from Sony has a lot of advantages, which are primarily aimed at functionality. As in many models, the bracelet does not have a display, and all data can be received on any device with android or iOS operating systems. Additional advantages include water resistance and high wear resistance. One of the downsides is that it is only compatible with new android devices with an OS version of at least 4.4. However, the low cost and reliability of this model make it one of the best in terms of price / quality ratio.

Garmin Vivofit

For those who are interested in sports gadgets, this brand will be familiar. The device came out really high quality, both in terms of functionality and wear resistance of the case and the bracelet itself. Vivofit stands out due to the most accurate data transmission, the error of which does not go beyond 5%. Also, the most important difference is that the model is equipped with a separate heart rate monitor, which is attached to the chest. It allows you to transfer data with maximum accuracy, so the bracelet will be an excellent solution for people who lead an active lifestyle and engage in various sports (fitness, running, cycling, swimming, etc.).

The SMART BAND H5S pedometer bracelet is a stylish, fashionable, advanced accessory made of high-strength materials. The main feature of the bracelet is its versatility, because it is not just a modern decoration, but a real mini-smartphone. Despite the modernity of the gadget, it is relatively inexpensive, but it has a number of undeniable advantages compared to more expensive counterparts:

The presence of a convenient touch display with LED backlight and a clear interface;
Built-in sleep analyzer, time of day display;
Elastic rubber strap;
3D pedometer and the ability to measure ambient temperature;
Variety of colors (purple, blue, black).

A modern accessory and gadget will allow its owner to continuously monitor the heart rate, monitor the volume of walking, etc. It is enough to set the time for determining the heartbeat in a special mobile application, shake your hand, and the small wrist assistant will begin its work. The device is compatible with smartphones and PCs, which allows you to quickly set a fixed frequency for measuring heart rhythms.

Do you use fitness bracelets?

Three years ago, my friends and acquaintances went crazy en masse. While I went to the gym more or less regularly and kept fit, they bought bright Jawbone fitness bracelets.

As a result, all our meetings were reduced to presentations of a mega-useful gadget. We got together, and I listened over and over again that doing sports without a tracker is no longer solid. That in the application it is necessary to enter information about the absorbed calories. That sleep is extremely important (wow!), and Jawbone allows you to control and correct it.

Joint trips to restaurants have turned into clowning. At the end (and sometimes in the middle) of meals, people took out their iPhones in all seriousness, and then, with an important look, they counted and drove in calories. Sometimes the energy value had to be googled, but acquaintances were not lazy. Jawbone turned them into ghouls for a time. Both girls with the first signs of anorexia and pot-bellied guys who suddenly fell out of love with beer followed nutrition, sleep and physical activity.

When I asked if this kind of attention to data could really help you become a fitness hero, I got poked in the nose at some charts. “Look, today I went more than yesterday. We’ll go out of town on the weekend, I’ll set a record in general,” there was so much sincerity and optimism in these words that I didn’t troll and didn’t convince.

Soon the bracelets came to the gym. The line was clear: muscular guys in wet t-shirts doing chest presses and squats, while tracker wearers relaxed on the lightest cardio machines. Their foreheads didn’t even have time to sweat, and the pauses between sets were endless, because the victims of the bracelets constantly monitored their progress on their iPhones.

Getting in shape was delayed, but in the locker room, only the Jawbone and other similar devices were discussed. The real jocks at that time were silent: someone was sipping protein, and someone was so tired of pulling iron that they could not find the strength to maintain a dialogue with connoisseurs of new technologies.

At the same time, bracelet fans took to social media and posted run reports every other day. There was nothing wrong with that, just the percentage of pride in their posts went through the roof. Fortunately, almost all runners quickly broke down and stopped the daily broadcast of morning routes.

The tracker trend lasted less than a year, and then the bracelets suddenly began to disappear from the wrists. When I asked why this happened, former fans of trendy gadgets listed the reasons for a long time:

1. Tired of charging. Someone had to do this once every 2 days, someone once every 10 days, but the process itself was still annoying.

2. Tired of bathing with food and calories. Of course, entering all the data manually is very dreary - it takes a lot of time.

3. It is inconvenient to constantly walk with a bracelet on your hand. It's a matter of habit, but sometimes an extraneous gum on the arm can really infuriate.

4. The bracelet is broken. As a rule, suddenly stopped charging (chronic Jawbone disease). Or died after contact with water, if it was not waterproof.

5. The bracelet is lost. The clasp broke, flew off the hand, and you don’t even remember where it all happened.

And only a few people were honest with me. “You know, I thought that this thing would make me go in for sports. But in vain - as I loved the sofa and beer more than the rocking chair, I continue to love it,” an adequate explanation sounded like this.

This is the main disadvantage of a fitness bracelet - it is not magical, but it creates the illusion of magic. “Yes, now I will go in for sports, I will move a lot, I will quickly lose extra pounds,” those who just got a tracker think. It's strange that these people don't buy a GoPro in the hope that life will instantly become brighter after buying it. The logic here is the same as with bracelets.

If you spend a couple of evenings reading specialized literature, it becomes clear that in most cases you can lose weight and pump up without electronic accessories. The main thing is to work hard, not sparing yourself (if possible, with a trainer and a nutritionist), and not to believe in miraculous bracelets.

The target audience of these false trackers is just naive beginners who do not understand that the bracelet is useless at the initial stage of training. It is needed not by amateurs, but by experienced athletes who have already reached the peak of their form and want to figure out how to squeeze even more opportunities out of the body.

But for athletes and trackers are different - powerful, professional and quite expensive (on average - 500-1000 dollars). And bracelets in the Jawbone genre are toys that randomly count the pulse (or do not count at all) and send obvious indicators to the smartphone, such as the number of steps and the distance traveled.

In fact, the only not hopeless function is a smart vibrating alarm clock that works at the most comfortable time for the body. But such an alarm clock is also in the Xiaomi MiBand bracelet for a couple of thousand rubles - it is not surprising that this device slammed almost all other amateur trackers.

According to analysts from eMarketer, the fitness bracelet market has fallen by 40% over the past year. Jawbone (the most mainstream firm) almost collapsed back in May 2016, but finally announced the death of its own trackers just now. Fitbit is also in crisis - out of desperation, the company bought out the startup Pebble and will produce smart watches. They, unlike dying fitness bracelets, look at least some future.

They are simply more practical and functional: they have notifications, a voice assistant, music control and other convenient things. Therefore, a person who buys a watch for sports will not throw it in a dusty box when he finally realizes that the secret of a good figure is not in a fashionable gadget, but in banal willpower.

People who, even with a busy life, strive to find ways to monitor their health, have long been aware of the existence of such smart accessories as fitness bracelets. If you belong to this category of citizens and have already begun to ask the price of potential inhabitants of your wrist, then we advise you not to rush. If you already have an iPhone 5s, iPhone 6, or iPhone 6 Plus, then you probably don't have to worry about the extra cost.

If you don't know, your smartphones have motion co-processors installed, that is, in fact, the same chips that are used in popular models of pedometers. And if you open it in iOS 8, you will find that the system has been monitoring your movements for a long time and keeps daily statistics of the steps you have taken. Thus, we can already say that if you have one of the above-mentioned iPhone models, then you already carry a pedometer in your pocket. And if you install a good application for tracking movements, then the question arises: do you need to buy a special accessory for this?

Recently, a study by scientists from the University of Pennsylvania was published, which compared the accuracy of pedometer readings of popular fitness bracelets, as well as several models of smartphones with installed applications for tracking steps. The comparison included: Samsung Galaxy S4 with the Moves app, with the Moves, Health Mate and Fitbit apps, as well as bracelets, Fitbit Flex, Fitbit One, Fitbit Zip and Digi-Walker SW-200.

Participants in the experiment were asked to walk 500 and 1500 steps on a treadmill at a speed of 5 km/h. To obtain the most accurate results, the process was repeated 28 times. As a result, the readings of smartphone sensors deviated from real data in the range from -6.7 to 6.2 percent. The bracelets showed much less impressive accuracy: the deviation range from -22.7 to 1.5 percent.

First of all, I would like to sympathize with those who purchased the Fuelband bracelet: Nike's miracle of technology as a pedometer has significantly yielded not only to bracelets, but also to phones. In the above graph, you can see how far the recorded indicators deviate from the actual number of steps taken.

The Fitbit One and Fitbit Zip bracelets showed near-perfect results, but if you look at the results demonstrated by the iPhone 5s, it becomes obvious that the M7 co-processor is not so wrong to go to the store for a fitness accessory.

The results of this test indicate one thing: if sports bracelets can be of interest to owners of iPhone models of the last two years, then perhaps the function of an alarm clock and a notification. As for their main purpose, here their presence seems completely redundant. It remains to wait until April and see what performance will show the long-awaited Apple Watch, which is designed to make a real revolution in the field of sports and healthcare.

Sourced from jamanetwork.com