Posts Tagged ‘fitness’

Heart Rate Monitoring in the Age of Wearables

Written by Brooks Canavesi on . Posted in Blog, IoT, Mobile App Development, Technology trends, Uncategorized

You don’t have to be a fitness fanatic to monitor your heart rate. This useful piece of data is an important marker of cardiovascular health and monitoring how it changes over time can help you maintain a healthy lifestyle and stay within the recommended resting heart rate (RHR) range for adults, which ranges from 60 to 100 beats per minute. “A high RHR could be a sign of an increased risk of cardiac risk in some situations, as the more beats your heart has to take eventually takes a toll on its overall function,” says Dr. Jason Wasfy, director of quality and analytics at Harvard-affiliated Massachusetts General Hospital Heart Center.  According to a 2013 study published in the journal Heart tracked the cardiovascular health of about 3,000 men, even a slightly higher RHR can double the risk of premature death. Fortunately, we live in the age of wearables, and it has never been easier to monitor heart rate in all real-life situations. Modern wearables make heart rate monitoring convenient, affordable, and sometimes even fun. But can relatively inexpensive gadgets from young tech companies produce reliable heart rate data? Let’s find out the answer.

Multiple Options

There are two main types of modern wearables that can be used for heart rate monitoring: chest straps and wrist devices. Each of these two types uses a completely different technology to measure heart rate, and each is suitable for different applications.

Chest Straps

Heart rate monitoring chest straps, such as the Polar H10, have been around for a while, but they’ve never looked as sleek and haven’t been as feature-packed as they are today. Chest straps measure heart rate using a processed called electrocardiography (ECG or EKG). The same processed is used by heart rate monitors in hospitals, and it records the electrical activity of the heart over a period of time using electrodes placed over the skin. While ECG machines in hospitals use multiple electrodes placed on different spots on the chest, chest straps typically have only one or two electrodes placed either underneath the breastbone or on the inner portion of the rib cage. Even with only one or two electrodes, chest straps produce highly accurate data, which has made them the favorite heart rate monitoring wearable of serious athletes. The biggest downside of chest straps is how uncomfortable they can be after a while. Chest straps are designed to stay in place during strenuous physical activity, which means they are as tight as necessary to ensure they won’t move out of place.

Wrist Devices

On the other hand, wrist devices with heart rate monitoring capabilities are just as comfortable as traditional watches, so it’s easy to wear them all day long, even during sleep, without any discomfort. Unlike chest straps, wrist devices measure heart rate using a processed called photoplethysmography (PPG). “PPG is a simple and low-cost optical technique that can be used to detect blood volume changes in the microvascular bed of tissue. It is often used non-invasively to make measurements at the skin surface,” explains Dr. John Allen, lead clinical scientist and honorary reader in microcirculation and vascular optics at Freeman Hospital in the UK. In other words, wrist devices, such as the Fitbit Charge 3, use optical sensors to see the blood pulsing through veins. Some manufacturers of heart rate monitoring wrist devices claim that their products offer the same accuracy as leading chest straps, but many experts find this hard to believe. The good news is that there’s now a growing body of scientific research that can help us decide whether wrist devices are useful health and fitness tools or just gimmicks that produce inaccurate data and mislead their users.

Trusting the Numbers

A group of scientists from the University of Louisville conducted a study to compare the average heart rate readings of two different heart rate technologies (PPG vs. ECG) after an interval style cardio-based workout. After conducting a total of 30 trials, the scientists found no significant difference between the two technologies. A difference of plus or minus 5 beats per minutes appeared only around 155–160 beats per minute, with ECG being more accurate. This means that the only users of wearable heart rate monitoring devices who might benefit from ECG technology are committed athletes who frequently push their heart rate to over 160 beats per minute. “One potential cause for the inaccuracies could exist within how PPG technology works. LED lights are pulsed into the skin and are reflected to the sensor by the capillaries. Therefore, the LED rate could be an issue. If light is not being sent fast enough, and the refracted light gets absorbed or delayed in any way, then PPG would indicate a lower HR, which is what was observed around the 155 – 160 bpm thresholds,” the researchers commented. “A second potential cause for inaccuracies lies within the workout itself. The workout involved running, which has been noted to potentially lead to HR inaccuracies within PPG algorithms.” As accurate as modern wrist devices are, they are not intended to match medical devices or scientific measurement devices. Most manufacturers of fitness-oriented heart rate monitors even explicitly state that their products are not medical devices and are intended for recreational purposes only. When used with this in mind, wrist devices provide a very convenient way how to monitor heart rate throughout the day.

Conclusion

Medical professionals and even health and fitness experts are preaching the benefits of heart rate monitoring, and the wearables industry has a whole range of heart rate monitors that allow anyone to stay on top of this critical marker of cardiovascular health. In recent years, researchers have been able to confirm that wrist devices are just as accurate as chest bands for regular applications, but serious athletes should still stick with ECG technology.

Fitness Trackers: A Way to Good Health or a Big Privacy Threat

Written by Brooks Canavesi on . Posted in Blog, Mobile App Development, Technology trends

Since their first appearance on the consumer market, people from all around the world have fallen in love with fitness trackers. Data from Statistica reveal that there were more than 13 million sold in the United States in just the last two years. These devices are great at keeping people motivated to adhere to healthy exercise habits, monitor their daily caloric intake, or watch out for dangerously high stress levels. But many security experts and technology analysts are unsure whether they are equally great at protecting all the associated private data.

A typical fitness tracker (also known as activity tracker) is an electronic device fitted with a wide assortment of specialized sensors that measure anything from heart rate to the quality of sleep, distance walked, body and ambient temperature, elevation, acceleration, speed, position, or calorie consumption. We can expect that future fitness trackers will be FDA-approved devices capable of alerting users to medical problems and suggesting the best possible remedy or action to take.

Integrated sensors collect various information, which are then both processed locally to display results on the device itself and sent to the cloud in order to allow for multi-platform access and management. This is exactly where the biggest problem is: most users are not aware of how their data are being used, who exactly can access them, and how they could be used for identity theft in case it falls into the wrong hands.

This is not surprising at all. With the average terms of service agreement nearing 5,000 words, the temptation to skip all that hassle and just click on the “agree” button is very high. However, when customers do so, they unknowingly give access to their private data to third-party companies, as discovered by the Federal Trade Commission (FTC) in 2014. The commission reported that a sample of a dozen health and fitness apps collectively sent data to 76 third parties. What exactly can those third-party companies do with users’ data is only between them and the manufacturer of the particular fitness tracking device.

To outline some of the contemporary data handling issues in this industry segment, Open Effect, a Canadian not-for-profit that conducts research and advocacy efforts focused on ensuring people’s personal data is treated securely and accountably, create a report called Every Step You Take.

They studied some of the most popular fitness tracking applications in the Google Play store as of mid-2015 and asked the following questions: What technical security mechanisms are in place? How could they be exploited? What categories of data does each device actually collect?

All device except for one transmitted their data over the internet. In some cases, this included sensitive and unnecessary information such as the IMEI number or fine-grained location data. Out of all devices, only the Apple Watch randomized the MAC address as a protective measure against persistent monitoring of the wearer’s presence. What’s much more alarming than the absence of the MAC address randomization is Garmin’s failure to implement HTTPS encryption to secure the transmission of personal information. The company has since then corrected this flaw, but nobody can know for sure how many other devices on the market remain similarly defenseless against even the most basic types of attacks.

As explained by Theresa Payton, president and CEO of Fortalice and a former White House CIO, “The culprit is the innovation life cycle. There is tremendous pressure to get cool and affordable products on the market at a dizzying speed.” She went on to say that wearables and associated apps “have a track record of poor privacy and security measures.”

A good news is that substantial effort has been and is being made to protect the privacy and security of end-users. The IEEE Center for Secure Design released a paper titled, “WearFit: Security Design Analysis of a Wearable Fitness Tracker,” to “addresses each of the top 10 software security design flaws” of fitness trackers and show developers of these devices how to design a product that meets all modern security standards.

Their WearFit system is an imaginary wearable personal health monitoring device that resembles many currently available products. The device can measure step count and heart rate and sends the data to a compatible mobile application, which then communicates with the platform backend. Many common attack vectors were taken into consideration, including Denial of Service (DoS), falsifying the users’ data, stealing users’ data via SQL injection or phishing, and, for example, compromising device integrity with malicious firmware updates.

It’s hard to predict what future holds for fitness trackers. As customers are becoming increasingly more conscious of their privacy and security, companies will have to ensure that their products are free of any vulnerabilities that could lead to a data leakage or a loss of sensitive information. Customers themselves should demand a high level of transparency when it comes to how exactly their data are handled and used. Only then we’ll be able to embrace all latest technological innovations and used them to improve our daily lives.

Do You Have a Diet Mobile App?

Written by Brooks Canavesi on . Posted in Blog, Mobile App Development

These days there’s a mobile app for just about everything, so it figures that diet and nutrition trackers are becoming a big hit. They let you log your nutrition intake, shop for healthy foods and pick and choose healthy eating plans. Take a look at these 5 apps worth trying.
  1. Fooducate (iOS, Android)
This mobile app helps you to both shop and eat healthy. It lets you quickly pull up nutritional information from the barcodes on food products and can help you make sense of those nutrition labels that otherwise come across as gibberish. The app shows you a letter grade from A to D, and offers up a quick summary of nutritional information in easy-to-understand language. It will also suggest healthier alternatives. Whether you eat out or cook, you can manually enter nutrition information. The mobile app also doubles as a calorie, exercise and intake tracker.
  1. Shopwell (iOS; Android)
Shopping well is definitely the first step to eating well. That’s the idea behind Shopwell that will scan barcodes and rate groceries according to your nutritional needs. The app creates a personal profile and will select from various nutritional goals while also implementing necessary dietary restrictions, like food allergies or vegetarianism.  The app takes all these elements into account and uses them to score the items you scan while offering easy-to-follow nutritional pointers.
  1. Calorie Counter Pro (iOS, Android)
This mobile app is an all-in-one exercise tracker, food scanner and nutrition log. Users can scan barcodes for nutritional information and input recipes and custom foods. The exercise tracker lets you enter over 500 different activities and you can also manually enter calories burned, distance and time for walking. What’s more, there are planning features for dieters wishing to set a target weight or plan their exercise and eating.
  1. Diet Point Weight Loss (iOS, Android)
Another mobile app that helps users select the right weight loss program for their needs. There are over 130 diets programmed under various categories as well as complete meal plans and shopping lists. The app will notify you that it is mealtime and help avoid those cravings or overeating. Whether you’re going low-carb or full-on caveman, the app will have the plan for you.
  1. Nutrino (iOS)
This is a meal planning and nutritional goals mobile app. It’s been designed to work with other devices and apps to track physical activity and adjust food recommendations accordingly. Users are able to set their nutritional goals – be it muscle building, weight loss or healthy eating – and also set dietary restrictions such as halal, gluten-free or lactose-intolerant. The app will build a personalized meal plan based on the information and users can further customize the plan by inputting preferred foods or swiping for alternatives. Water intake, sleep and exercise can all be logged. Mobile Apps for Diet – Would You Use Them? Would you use these kinds of apps for your dietary and lifestyle requirements? Have you had any experience with them? Feel free to share in our mobile app section.