After returning from Xi’an, I fired my personal trainer

Since about two years ago, I have never worn a watch. I wore a smart watch to lose weight, mainly to obtain various health indicators so as to better supervise and guide me to exercise.

But every time I look at these sports data, in addition to the full sense of accomplishment, there is still a question in my mind: how does this little watch obtain such diverse and complex sports data? Are these data accurate?

Many colleagues around me also have the habit of wearing smart watches. Most of them bought smart watches for the exercise recording function.

Everyone likes all kinds of sports, including dance forest masters, streetball princes, and horse racing. I have to sigh that they are really crouching tiger, hidden dragon. Although they enjoy different types of sports, they all use their watches to record their current sports. So I asked them the same question: Do you think the data is accurate? They shook their heads, believing.

This question also applies to other health peripherals. For example, how do products such as body fat scales and bracelets accurately measure various human body data? We tend to think that data is not always deceiving, but I still want to clarify this issue.

Wait for me to clean up and take you to a place.

This time we came to Xi'an with a very simple purpose. It is to take a look at Huawei's sports health science laboratory here.

Walk up~

This laboratory is very large, with an area of ​​1100 square meters, divided into two areas: the reliability and automation test area on the first floor, which mainly tests whether the product is durable; the professional evaluation test area on the third floor, which is used to simulate various sports Scenes, collect human sports health data to assist product development work.

The focus of our visit today is this area on the third floor. You can see that there are many test items in this space, let's look at them one by one.

On the left hand side of the door is the team gymnastics area. There are usually professional athletes, general enthusiasts and even general users to do tests, including yoga, dance, exercises and so on. During the test, these testers will wear a professional heart rate belt to collect heart rate data during exercise.

More than 100 sports modes on Huawei watches will collect the corresponding heart rate data in this way to ensure that these sports modes have sufficient data support, so as to ensure the accuracy of algorithms and data.

Go to the right and you will be in the research area of ​​mass sports functions. It looks a lot like a gym, with rowing machines, cycling platforms, and many free machines. But unlike the gym, there are professional instruments next to these equipment to record exercise data and testers’ physical data.

Let's continue to look forward, this running sports research testing area is worth talking about. From the outside, this machine is no different from a treadmill, but it is actually a foot pressure treadmill with a cost of more than 600,000 yuan. There are more than 7000 pressure sensors distributed inside. After I stand up, I can record the pressure distribution and balance parameters of the soles of the feet in real time.

When I click start, walk or run for a minute, a set of data can be generated. From the data, we can see whether my gait is healthy and whether the pressure distribution is even. After the developers have collected enough data, they can form a set of algorithms to identify and correct incorrect running postures.

For friends who like to run, real-time heart rate is very important, because it has a great influence on the effect of running. So, is the heart rate tested by the Huawei watch accurate? We experienced an unpowered treadmill on the spot. Under different sports speed scenarios, the heart rate fluctuations tested by professional heart rate belts are almost the same as those of Huawei watches, with many lines overlapping.

Accurate test results are supported by huge data. Testers told us that in 2020 alone, Huawei has collected 105,000 kilometers of running data, which can go around the equator two and a half times.

Going further is the heart and lung function research testing area. This treadmill is mainly used to test the maximum oxygen uptake and measure energy consumption. The maximum oxygen uptake and energy expenditure were analyzed through the cardiopulmonary function and metabolism meter worn by the subjects. So as to provide users with scientific running solutions.

The previous area is very interesting, it is a million-dollar motion gesture capture system. There is a circle of infrared cameras around, professional athletes wearing motion capture suits, their bodies are covered with reflection points according to the bones of their bodies. When the athletes dribble and slam dunk inside, it's a bit like making a live-action CG movie.

And we can observe the athlete's posture and trajectory in real time through the screen outside the field. After these data are collected enough, engineers can use in-depth algorithms to polish the basketball running and jumping indicators more professionally, and apply them to their own basketball elf products for only about 100 yuan.

Finally, we look at another area. This is the golf research and testing area. Although golf is a relatively niche sport, Huawei does not despise it. After experiencing more than 20,000 swings and collecting more than 2500 sets of professional data. Huawei introduced a new feature on the WATCH GT2 Pro watch-golf driving range mode.

Turn on this mode, not only action guidance, but also swing action analysis, heart rate analysis, etc. For golf novices like me, after trying twice, they can play a pretty good track, and the sense of accomplishment is still very strong.

After strolling around, I noticed the area of ​​Huawei before leaving, showing my footprints in the sports and health field. From the release of Huawei TalkBand B1 in 2014, to the iteration of sports health monitoring technology for generations of smart wearable products, to the development of heart health, sleep apnea, blood oxygen saturation and other fields. Every time we move forward, there is a huge amount of experimental data behind it. Data does not speak, but it is worth a thousand words.

In fact, before coming to the Huawei Sports and Health Laboratory, I wore a smart watch to exercise. It was just a habit, instead of taking these data as a rigorous reference. I believe that there are many friends in front of the screen like me.

It feels like the data generated on the table is like Schrödinger’s cat. You will not be easily convinced unless you have witnessed the results of comparison with professional equipment.

But today, I spent a whole day here, experienced so many projects, and listened to the vivid explanations of the staff. It is a rare opportunity to use this small wearable device that we usually use. , To compare with those medical-grade professional equipment in the laboratory.

As you can see, the measured data are almost the same, indicating that Huawei's efforts in the field of sports and health are not in vain, because only close to the real data is useful data for users.

The first time I participated in the experiment, I would find it interesting, but after the staff repeated the same experiment hundreds of times, all that was left was boring statistics.

Is this interesting? It's meaningless. But does it make sense? Of course there is!

After this trip to Xi'an, I am very happy to see that Huawei has been working hard in the direction of "digital health" and has achieved small results. It turns out that the watch I am wearing even knows myself better than me. I believe that with its company, I can walk more easily and go further on the road of sports.

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Ai Faner | Original link · View comments · Sina Weibo