Technologies
Your Smartwatch’s Sleep Tracker May Be Sleeping on the Job
Stress sensors are inaccurate and sometimes report the opposite of user experiences, new research finds
If sleep is important to you — and it should be — you might want to think twice before you put a lot of stock in the latest stress charts from your fitness wearable. A recent study from the Netherlands’ Leiden University, published in the Journal of Psychopathology and Clinical Science, has found that when smartwatches and similar devices record readings on stress, fatigue or sleep, they’re frequently getting it wrong.
Researchers studied 800 young adults using the same Garmin Vivosmart 4 smartwatch model. They compared the data the smartwatches produced with the reports that the users created four times per day about how sleepy or stressed they were feeling. Lead author and associate professor Eiko Fried said the correlation between the wearable data and the user-created data was “basically zero.”
A representative for Garmin did not immediately respond to a request for comment.Â
Stressed or sex? Your watch doesn’t know
So why do wearables like fitness smartwatches get it so wrong? Their sensors are fairly limited in what they can do. Watches like these need to be worn correctly at all times (a loose or tight watch may give poor readings, for example), and they typically use basic information like pulse rate and movement to make guesses about health.
Those guesses don’t always reflect real-world scenarios. A wearable may identify high stress when the real cause of the change was a workout, excitement over good news or sex. There are so many potential alternatives to stress or fatigue that the watches in the study never really got it right — and the devices sometimes guessed the complete opposite emotional state from what users recorded.
The Dutch study did note that Garmin’s Body Battery readings, which specifically measure physical fatigue, were more reliable than stress indicators, but still inaccurate. And sleep sensing performed the best of them all, with Garmin watches showing a two-thirds chance of noting the differences between a good night’s sleep and a bad one.
It’s also worth noting that smartwatch sensors can become more accurate as technology improves. It would be interesting to run a similar study with the newer Garmin Vivosmart 5 to see if anything has improved, as well as see if other models like the latest versions of the Apple Watch have similar accuracy results.
Technologies
Anthropic warns investors of AI’s ‘existential risk to humanity’ in IPO prospectus, reports say
Anthropic’s IPO filing dedicates 80 pages to the risks of AI, nearly double the 48 pages it spends discussing its business plans, according to Reuters.
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Technologies
U.S., Iran hold separate mediator talks as Mideast oil exports hit war-time high
Iranian and U.S. officials reportedly met separately with mediators Monday to push for a ceasefire, as Middle Eastern crude exports rebounded to war-time high.
Iranian and U.S. officials reportedly met separately with mediators Monday to push for a ceasefire.
Middle Eastern crude exports rebounded this month to around their highest level since the war began in February.
An outright export ban by Washington on diesel would keep roughly 1.2 million barrels a day at home, and risks overwhelming Gulf Coast storage, according to Kpler.
The building of the destroyed Shajareh Tayebeh primary school is pictured surrounded by rubble in Minab in Iran’s Hormozgan province on August 10, 2026. Six months on, a team of AFP journalists obtained rare access to the school which has remained largely in ruins, its collapsed walls and twisted steel now surrounded by portraits of the children killed as Iranian flags flutter above the rubble. Iran says the attack on the school involved two separate US Tomahawk missiles but neither the United States nor Israel has officially claimed responsibility for the strike. (Photo by ATTA KENARE / AFP via Getty Images) /
Atta Kenare | Afp | Getty Images
U.S. and Iranian officials have reportedly held separate indirect talks with mediators on Monday, reviving efforts to end seven months of war as Tehran presses for a response to a revised ceasefire framework and Middle East crude exports climb to their highest level since the conflict began.
Iranian Foreign Minister Abbas Araghchi met Qatari mediators in New York, where he remained after the United Nations General Assembly, and reportedly said he expects Washington’s reply by Tuesday. “We talked about ideas and how to find solutions to fulfil Iran’s conditions,” Araghchi said, adding that he planned to return to Tehran once a response arrives. “Whenever the Qataris have a response, they know how to get it to us.”
Iran’s proposal, first presented on the sidelines of last week’s General Assembly, calls for a four- to five-day U.S. timeline to release frozen Iranian funds, lift sanctions on Iranian oil and end the naval blockade of Iranian ports, with nuclear talks beginning within seven days. Tehran has tied any reopening of the Strait of Hormuz to those steps.
President Donald Trump had on Sunday called the plan “unacceptable” and rejected it, telling reporters Iran wants a swift deal because of the economic pressure it is under. Speaking at the White House Monday, Trump said U.S. officials had spoken separately with mediators but gave no further details, adding: “We’re going to win. It’s going to go pretty quickly.”
The diplomatic push comes as physical supply data shows the war’s toll on the oil market easing. Middle Eastern crude exports rebounded this month to around their highest level since the war began in February, Kpler data showed. “Middle East crude exports at just under 80% of pre-conflict levels,” the tracking firm said in a note on Monday.
The Strait of Hormuz itself remains far from normal. Kpler’s real-time tracking showed total clearance through the strait at 10,591 kilobarrels a day on Saturday, against a pre-war baseline of 17,133.
Technologies
Oil prices fall as crude exports recover at Saudi Arabia’s Red Sea ports
Saudi Arabia has restored flows through the pipeline to around 3.5 million barrels per day, according to media reports.
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