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Smartwatches and Fitness Trackers May Be Unreliable in Tracking

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Smartwatches and Fitness Trackers May Be Unreliable in Tracking

Smartwatches and fitness trackers have come a long way, offering more comprehensive health and fitness tracking capabilities than ever. As these devices continue to improve, has recorded data using these devices become more reliable? A new study suggests you shouldn’t trust all the metrics your smartwatch or fitness tracker records.

Published in Sports Medicine, a recent system review revealed the state of smartwatches and fitness trackers today regarding their reliability and potential limitations in terms of tracking vital metrics, ranging from heart rate and SpO2 to aerobic capacity and sleep.

Researchers conducted an umbrella review, which compiled several findings into a single study that involved over 430,465 participants. The gathered data yielded surprising findings that support how key tracking features in wearables have improved over the years, while some tools could still be far from being truly reliable.

Which aspects of health metrics from smartwatches are reliable?

One of the key findings showed how the heart rate measurement in today’s smartwatches and fitness trackers has an accuracy of +/- 3 percent with the possibility of a slight deviation. This means the heart rate data from these wearables are highly accurate.

The same case is touted for arrhythmia detection including Afib, with the sensitivity and specificity of the feature touted to be 100 percent and 95 percent accurate, respectively. Moreover, blood oxygen level saturation or SpO2 monitoring has also shown a 2 percent mean difference, indicating a high level of reliability.

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Smartwatches might not be reliable enough to monitor your sleep and fitness activities

It is on the wellness and fitness fronts that smartwatches and fitness trackers seem to exhibit a notable degree of inaccuracy. For instance, VO2 max, or a measurement of the amount of oxygen your body can absorb and use during workouts, has been highlighted to produce about +/- 15 percent difference during rests and +/- 9 percent during exercises. On the other hand, a bigger mean error is observed when tracking physical activity intensity.

Garmin Forerunner 965 on-screen health and training recommendations / © NextPit

Even so, the findings mentioned that wearables also fail to deliver dependable step counts despite being one of the most basic features. It listed mean errors as falling between -9 to +12 percent. Meanwhile, calorie expenditure measurement, or the amount of calories burned during a workout, has an even worse accuracy rate with a -21 percent to +15 percent difference.

Regarding sleep, data from smartwatches and fitness trackers might not be relied upon as well. The study revealed these devices overestimate sleep time by as much as 10 percent when compared to results from polysomnography.

What can we build from this? Are wearables only useful to capture valuable health and fitness insights? Users should be aware that accuracy in other metrics does vary significantly and they should be cautious when interpreting such data.

What is your opinion on this study? How do you manage your health from your smartwatch or fitness tracker? We want to hear your thoughts on this.

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Fitness

Extreme fitness, viral videos could be boosting ‘rhabdo’ cases, health experts say | Globalnews.ca

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Extreme fitness, viral videos could be boosting ‘rhabdo’ cases, health experts say  | Globalnews.ca

Viral videos and “fitspiration” trends can sometimes do more harm than good, according to health experts.

One Atlantic province has already seen a rise in a rare and potentially life-threatening condition that can be caused by overexertion, known as rhabdomyolysis or rhabdo.

The syndrome is caused by rapid muscle breakdown and can be the result of extreme exercise, according to Dr. Ryan Henneberry, a Halifax-based sports medicine physician.

“(It can happen) especially in somebody who might have succumbed themself to exercise they hadn’t done in a while: the typical high-intense interval training, or the indoor cycling that’s common now,” he said.

It occurs when damaged cells release toxins into the blood, which can lead to severe issues, including kidney failure.

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“One might see the hallmark or classic tea-coloured urine, or darker urine or brown urine, and that would usually be associated with some form of muscle weakness or muscle pain,” said Henneberry.

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Newfoundland and Labrador Health Services said last month it confirmed about 20 cases in the eastern part of the province in the span of six months. Doctors typically expect to see a few cases a year, said Dr. Richard Barter, the clinical chief of emergency medicine in the authority’s eastern urban zone.

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“One doctor said they’ve seen seven cases in the last five months,” said Barter.

Most of those cases were among women aged 19 to 30. And health officials believe social media may play a role.

“There is a culture right now to do extreme activities,” said Barter.

“We suspect that there’s a lot of posting on social media about what you’ve done, the number of reps that you’ve done, how high you’ve got your heart rate … there’s a friendly jousting competitiveness going on.”

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Busting fitness myths: From metabolic conditioning to cortisol levels



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Elsewhere in Atlantic Canada, Nova Scotia Health said it has not seen any significant increases in rhabdo cases. Health authorities in New Brunswick did not provide data before deadline.

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Laura Perry, a personal trainer and owner of East Coast Barbell in Dartmouth, N.S., said preventing rhabdo means taking exercise slow — and low.

“We’re not going from zero to 100 in the very first day. We’re starting small and we’re learning how to move our bodies efficiently and safely,” said Perry.

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“Working out six days a week is not twice as good as working out three days a week. It doesn’t work in that way. The most important thing is to choose a routine that you can do consistently. That you have time to recover from.”

Others believe self-compassion can help, too.

While social media pressure may encourage intense workouts for some, it’s important to pause and consider the impacts.

“It could be really just recognizing that these are large systemic and often profitable industries that are perpetuating these messages,” said Eva Pila, an assistant professor at Western University School of Kinesiology.

“We need to adopt more kind, understanding and empathetic ways of relating to ourselves.”

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— With a file from The Canadian Press

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Fitness

Put the fun back in your fitness routine with this 10-minute follow-along workout from The Curvy Girl Trainer Lacee Green

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Put the fun back in your fitness routine with this 10-minute follow-along workout from The Curvy Girl Trainer Lacee Green

Ever feel like beginner-friendly workouts are anything but?

That’s how BODi Super Trainer Lacee Green felt, so she devised a three-week, entry-level program designed for genuine newcomers to exercise—or those just getting back into it.

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Fitness

Higher fitness levels linked to lower risk of depression, dementia – Harvard Health

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Higher fitness levels linked to lower risk of depression, dementia – Harvard Health
research review

People with high cardiorespiratory fitness were 36% less likely to experience depression and 39% less likely to develop dementia than those with low cardiorespiratory fitness. Even small improvements in fitness were linked to a lower risk. Experts believe that exercise’s ability to boost blood flow to the brain, reduce bodywide inflammation, and improve stress regulation may explain the connection.

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