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World Sleep Day: Experts on fitness trackers monitoring our sleep patterns

Updated on: 19 March,2021 11:22 AM IST  |  Mumbai
Sukanya Datta |

Fitness trackers of all kinds are flooding the market, claiming to our slumber patterns. On World Sleep Day, here’s a look at how they work and what health experts make of them

World Sleep Day: Experts on fitness trackers monitoring our sleep patterns

Representation pic

Survey Report, released by Royal Philips ahead of World Sleep Day, since the start of the pandemic, Indian adults experienced new sleep challenges such as difficulty in falling asleep (37 per cent), difficulty in staying asleep (27 per cent ), and waking up during the night (39 per cent). As we continue to grapple with changing slumber patterns, the fitness trackers’ industry has been growing, with more and more wrists, fingers and homes sporting bands, rings and wireless devices that track parameters ranging from steps to sleep. 


Tracking the market


Unlike a sleep study in a hospital, which can consume considerable time and money, these devices are accessible, and considered fashionable. But what data do they offer? Ali Rizvi, director, Garmin India that manufactures wearable trackers, shares that they help to identify a sleeping pattern. “They provide an in-depth analysis of how one is sleeping, the duration, quality, and a breakdown of their light, deep and REM [Rapid Eye Movement; a sleep stage] stages,” he claims, adding that these trackers help to manage one’s sleep according to their lifestyle. Gaurav Parchani, co-founder and CTO, Dozee, which produces thin sensor sheets that can be placed below mattresses, says as the product doesn’t require participation post installation, it’s handy for senior citizens. “Apart from monitoring heart and respiratory rates at night, we also document heart rate variability — an important parameter of your autonomic nervous system,” he says.


Dr Seemab Shaikh, Ali Rizvi, Dr Salil Bendre and Gaurav ParchaniDr Seemab Shaikh, Ali Rizvi, Dr Salil Bendre and Gaurav Parchani

According to a report on the John Hopkins Medicine website, trackers often factor in environmental indices like room temperature, lifestyle indices like when you ate your meal, and SpO2 or oxygen saturation. A spokesperson from Fitbit, another market player, noted, “Our activity trackers and smartwatches enable users to track their sleep stages through a combination of machine learning, accelerometer data, and heart rate variability.” Manufacturers including Fitbit and Dozee also offer a sleep score, “reflecting the quality of sleep,” the spokes-person asserted.

Exercise caution

Patients are getting hooked to these devices and the data they provide, claim doctors. “Patients often come to me on the basis of the data on the tracker. They get obsessed with improving just that data or score; they aren’t concerned with the right indices for treatment,” points out Pune-based ENT surgeon and sleep specialist Dr Seemab Shaikh, founder national president of the Indian Association of Surgeons for Sleep Apnea. Citing the example of Obstructive Sleep Apnea, he elaborates, “In this case, it’s your breathing pattern at night which disturbs your sleep. For the device to detect this problem, it needs to be connected to your airway at night [and regular trackers aren’t]. So, they provide limited information; if you have neurological or any psychological concerns, that won’t reflect either.” 

Dr Salil S Bendre, consultant, pulmonology, and sleep medicine specialist, Nanavati Super Speciality Hospital, says trackers are screening devices. “They aren’t investigations that can confirm disorders, so we can’t plan treatment based on their data. If you experience fragmented sleep, go to a sleep specialist who will diagnose if you need a sleep study.”

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