Updated: 04:42 EDT, 6 September 2022
Wearable health technology has exploded in popularity. From digital insoles that track your steps to bracelets that chart your fertility to digital insoles that correct your walking, to bracelets that track your fertility, it is a lucrative industry. Professor Ian Swaine, a University of Greenwich sport and exercise scientist, says that fitness trackers can help motivate people to exercise and keep them more informed about their health. The novelty of the technology is often lost and, while there have been significant advancements in the last couple decades, it involves sensors that aren’t always reliable, as well as computer estimations and algorithms that crunch numbers into results. Research has shown that this can lead to inaccuracies. Dr Nisa Aslam, London-based GP, says that while some of this technology can monitor conditions like diabetes, initial health assessments and yearly checks-ups still need be done in person by a physician. We then rated the gadgets. Fitbit Charge 5,?129.99 on fitbit.comClaim. This Fitbit is the’most advanced’. It monitors activity, heart rate, and sleep patterns, and checks for irregular heart rhythms with an ECG. It also measures stress with an electrodermal activ (EDA) sensor. Expert verdict: This reflects the trend towards home health management, which is partly due to difficulties in seeing GPs face-to-face. A wrist monitor shouldn’t be used to replace a doctor for heart health. Wrist sensors aren’t able to measure irregular heart rhythms accurately. It claims to be able to detect stress levels by using an EDA sensor, which measures skin sweating. But we sweat for many reasons. The’readiness score’ may help you be more aware of when you need to rest, but there isn’t much science behind it. FreeStyle Libre 2, ?96.58, freestylelibre.co.ukClaim: This stick-on sensor connects to an app and can be used to ‘check your glucose any time, anywhere, with just a scan of your smartphone’. Expert verdict: This device is clinically accurate and a game-changer in type 1 and 2 diabetes. It is also available on the NHS. The discreet, small sensor monitors glucose levels in the interstitial Fluid, which is the clear fluid under the skin. It can be worn for 14 days and will eliminate the pain and hassle of finger-prick glucose monitoring. The readings indicate whether glucose trends up or down. Alarms alert patients if their glucose levels are too low or high. It saves time and provides peace of mind. Ava Fertility Monitor,?249, www.avawomen.com Claim : This bracelet tracks women’s monthly cycles by monitoring nine biomarkers, including skin temperature and breathing, heart rate, blood flow, and heart rate. It can be worn overnight and tells you every morning if it is a good day for a baby. It can detect an average of five fertile days per cycle and an 89% accuracy, according to the maker. Expert verdict: ‘Studies show that temperature and heart rate changes during a woman’s monthly cycle, increasing around days of ovulation when an egg is released. A woman is at her most fertile’, says Dr Aslam. These factors can be used to determine when ovulation occurs. Although there is a lot of solid research behind this bracelet, it is quite expensive. I recommend patients keep a journal using inexpensive, chemist-bought fertility tests. This is sufficient for most. ‘WHOOP.comClaim 4.0,?264. Claim: This device can be worn on the wrist or in pockets inside a sports bra or pyjamas to monitor heart rate and respiratory rate while sleeping. However, to assess overall sleep quality, a polysomnogram is required. This involves electrodes measuring brain waves, muscle movements and heart rate. This type of tracker can make people obsessed with their sleep hours. It is better to measure how you feel doing everyday activities. Amazfit PowerBuds Pro, £59, Amazon.co.uk Claim – These wireless earbuds measure your heart rate while you exercise and can help you estimate how hard you have worked. Professor Swaine says that this is a good test. This is useful for aerobic exercise like running or cycling. However, it is not as useful for resistance exercises such as weight lifting or Pilates, which can be very strenuous. Ear monitors measure heart beat through changes in the reflected light that passes through the skin of the ear. Chest monitors, however, are closer to the heart and more accurate. The ‘posture reminder’ theory states that sitting more makes you less active. However, research has shown that exercise can have health benefits. The jury is still out on whether this is true. ‘Viatom Sleep Pulse Oximeter, ?134.99, stressnomore.co.ukClaim: A wrist monitor that measures blood oxygen levels to help ‘Covid patients spot deterioration’. The maker claims that it also functions as a sleep-apnoea monitor. The wristband and finger sensor monitor oxygen levels and vibrate if they fall to a predetermined low level. It could be useful for people with sleep apnoea or Covid-19, COPD (chronic obstructive lung disease), and alerts them to seek medical attention. A pulse oximeter that you attach to your finger costs about?10 and is much more affordable. ‘Mifo Walkabout Watch 2?69.99, www.mifo.co.ukClaim : ‘A waterproof smartwatch that measures heart rate and blood oxygen levels. It can’t measure water levels in cells and it can’t predict how much exercise you’ve done. Most people know that water is essential for exercise. Feelings of thirst should be used to determine how much water you drink. It also claims to measure stress via ‘heart rate variability. These fluctuations can be difficult to measure and interpret. It is a reasonable-priced general fitness tracker. ‘Digitsole, ?89.99, decathlon.co.ukClaim: Digital insoles that promise to measure ‘ten aspects of your walking or running technique’, says the maker, ‘to improve your stride technique and efficiency’.Expert verdict: ‘These contain embedded sensors which measure changes in pressure as you walk or run,’ says Tim Veysey-Smith, a sports podiatrist at Active Podiatry in Goudhurst, Kent. This helps to measure stride length and foot strike patterns, as well as velocity of pronation (rolling in and outside of the foot) and supination (rolling in and out). It can be difficult to know what to do with the data. It is important to consult a qualified expert to properly interpret the data.
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