NewsMakers
‘Drunk riding’ behind almost half of fatal electric scooter crashes
Tatal crashes occur mainly in the evenings or through the night, and in all cases, no helmet has been worn.
In almost half of all fatal electric scooter crashes in Sweden, the rider has been under the influence of alcohol. These fatal crashes occur mainly in the evenings or through the night, and in all cases, no helmet has been worn. This is shown by a new study from Chalmers University of Technology, in Sweden, and the Swedish Transport Administration. The study also states that most fatal crashes occur with private electric scooters, rather than rentals.
The researchers have analysed all fatal crashes involving electric scooters, electric bicycles and conventional bicycles in Sweden between 2016 and 2024.
Alcohol is often a factor in fatal crashes occurring with all three of these vehicle types – but the figures for electric scooters stand out. Of the fatal e-scooter crashes, 44 per cent of the riders were under the influence of alcohol, compared to 27 per cent among e-bike riders and 13 per cent among cyclists.
More specifically the levels of alcohol in the blood have been shown to be high across all three groups. Of the e-scooter riders that were under the influence of alcohol, the median blood alcohol content was 1.8 per mille. This can be compared to the legal limit of alcohol content in the blood for driving a car in Sweden, which is 0.2 per mille, above which it is considered drunk driving, and 1.0 per mille in the blood which is considered aggravated drunk driving.
“Alcohol intoxication is a common issue among all road users, but it appears to be particularly severe among riders of electric scooters. Not only were many fatally injured e‑scooter riders intoxicated, but their levels of intoxication were also extremely high,” says Marco Dozza, Professor of Active Safety and Road User Behaviour at Chalmers University of Technology, and senior researcher in the study.
Lack of helmets worn in those killed
The study also showed that helmet use in fatal crashes was very low. Of those fatally injured riding an e-scooter, none were wearing a helmet. And for those killed riding an e-bike or a bicycle, only about 25 per cent were wearing a helmet.
Head injuries were the most common cause of death in all groups.
“The numbers speak for themselves. Since the head is the area of the body that is most affected by a fatal injury and almost no one wears a helmet, we have a clear opportunity to save lives. A helmet is not a guarantee but improves the chances dramatically, so we should do everything we can to encourage helmet use,” says Rahul Rajendra Pai, doctoral student at Chalmers and first author of the study.
“I think many people don’t understand the danger of using an electric scooter under the influence of alcohol, and think that the vehicle doesn’t go that fast,” says Marco Dozza. “But it is enough hitting a stone on the road or a small hole in the ground to lose balance, especially when intoxicated, because alcohol slows down cognition and reactions. If you don’t wear a helmet, it may end up even worse”.
Different crash patterns for different vehicles
The study included 204 deaths, and the researchers saw clear differences between the three vehicle types in terms of rider and crash patterns.
In fatal crashes involving ordinary bicycles, the median age of the cyclist was 71 years old. The crashes often occurred on weekdays and usually involved collisions with motor vehicles.
Fatal e-scooter crashes looked different. The riders had a median age of 47.5 years old, and most of the crashes were single vehicle crashes that occurred at weekends, evenings and nights.
According to the researchers, the results indicate the need for measures and regulations to be adapted to the different types of vehicles.
“The typical fatal bicycle crash, with an elderly cyclist being hit by a motor vehicle in daylight, may require completely different countermeasures than the typical fatal electric scooter crash, where a younger rider crashes alone at night while intoxicated,” says Marco Dozza.
Fatal crashes most common with private electric scooters
Almost nine out of ten alcohol-related e-scooter deaths occurred with privately owned vehicles. Public debate and regulations have largely focused on rented electric scooters, and operators have introduced measures such as speed limits and night restrictions. However, these measures do not affect privately owned electric scooters.
According to the researchers, rules and measures can to some extent counteract crashes with electric scooters. Marco Dozza, for example, is leading an ongoing study on how today’s sensor technology in rented electric scooters can make it possible to detect impaired riding ability in real time.
“If a vehicle can identify that its rider is not in control, it is possible to take various measures before a crash occurs. That kind of intelligent intervention can save lives, and is within reach,” he says.
At the same time, he emphasises that neither rules nor sensor technology alone can solve the problem.
“The big challenge with electric scooter riding is social norms and rider behaviour, and this does not disappear with regulations. Training is an important key to understanding how the vehicle should be handled and what you can, and cannot, do.
Rikard Fredriksson, Senior Advisor in Vehicle Safety at the Swedish Transport Administration and co-author of the study, agrees:
“Alcohol is still a major problem for road safety in Sweden. Alcohol is involved in about 20 per cent of all fatal road crashes. This study shows that the number of alcohol-related fatalities involving electric scooters is more than twice as high, at 44 per cent. We are committed to the development of technology to counteract electric scooter driving under the influence of alcohol. It is also important to always wear a helmet, and to use only a vehicle that cannot exceed legal speed,” he says.
The study, “Three modes, three profiles: Characterizing fatal crashes on e-scooters, e-bikes and conventional bicycles in Sweden”, has been published in the Journal of Safety Research. The authors are Rahul Rajendra Pai and Marco Dozza at Chalmers University of Technology, Sweden, as well as Rikard Fredriksson at the Swedish Transport Administration and Chalmers University of Technology.
Beauty & Fashion
Redefining aesthetics: From anti-aging to healthy aging
Growing attention is now being given to healthy aging, understanding how the entire face changes over time, preserving facial harmony, and helping people continue to look like themselves.
For decades, “anti-aging” has defined the beauty and aesthetics conversation, promising to erase wrinkles and reverse the signs of time. Today, that conversation is shifting.
Aging is no longer just about looking younger. Growing attention is now being given to healthy aging, understanding how the entire face changes over time, preserving facial harmony, and helping people continue to look like themselves.
A review published in Facial Plastic Surgery, The Anatomy of the Aging Face: A Review, describes aging as changes across bone, ligaments, muscles, fat, and skin. Another review in Aesthetic Surgery Journal, The Facial Aging Process From the “Inside Out”, explains how changes beneath the surface eventually become visible on top.
Studies in Plastic and Reconstructive Surgery show facial fat is organized into distinct anatomical compartments that can lose volume and shift position over time, altering facial shape and balance.
For multi-awarded aesthetic physician Dr. James Co, founder of Cosma Institute and Architect of Aesthetic Confidence, these findings are the reason aesthetic care must start with understanding, not just treating.
“Aging is not a disease we need to cure,” Co said. “It is a biological process. As physicians, our role is to understand what is changing beneath the surface, how those changes differ from person to person, and whether intervention is appropriate in the first place.”
“When you only look at the wrinkle, you are looking at the surface of a much bigger anatomical process,” he added. “The face ages as a system. Good assessment means understanding what is happening underneath before deciding what should be done on the surface.”
Part of that understanding is recognizing that no two faces age the same way. Two people can be the same age and experience aging very differently. Genetics, skeletal structure, fat distribution, skin characteristics, sun exposure, lifestyle, and environmental factors all influence how aging presents.
“Two patients can be the same age and come to me with completely different anatomy, lifestyles, concerns, and goals,” Co said. “Why would we expect their treatment plans to look exactly the same?”
This is where healthy aging broadens the conversation — from fixing isolated signs to looking at the face as a whole and listening to what the individual actually wants.
“Someone can want to look refreshed without wanting to look 20 years younger,” Co said. “Those are completely different goals.”
Rather than trying to freeze one version of the face forever, healthy aging acknowledges that the face will continue to change. As different structures change at different rates, the relationship between features evolves. Facial harmony is therefore not fixed.
“You cannot freeze one version of your face forever,” Co said. “But you can understand how the face is changing and make decisions that respect its natural proportions and your identity.”
In the age of social media, where aesthetic treatments are highly visible, Co cautions against self-diagnosis.
“Patients should not have to diagnose themselves from social media,” he said. “You might recognize a concern, but deciding why it is happening and what should be done about it requires proper assessment.”
The shift is also about how people feel, not just how they look. A 2022 review on minimally invasive facial aesthetic procedures found studies are increasingly looking beyond physical changes to include satisfaction with appearance and aspects of psychological and social well-being, while noting that evidence still needs careful interpretation.
For Co, this reinforces that success is not always about looking dramatically younger.
“We need to ask whether the result makes sense for the patient, whether expectations were met, and whether we preserved the things that make that person recognizable,” he said. “I would rather someone tell my patient, ‘You look well,’ than immediately ask, ‘What did you have done?'”
At Cosma Institute, Co applies this consultation-led philosophy through individualized assessment, facial harmony, medical judgment, and patient education. Having trained aesthetic practitioners across Southeast Asia and Europe, he advocates for natural-looking outcomes that respect the characteristics already present in each face — an approach that recently earned him two awards at the Merz Aesthetics Tala Awards.
For Co, the evolution of aesthetic medicine is not about having more tools, but knowing when to use them — and when not to.
“Aging cannot be stopped, and I don’t think that should be the promise,” he said. “What we can do is understand it better. We can look at the science, understand the anatomy, listen to the patient, and make decisions that allow them to age while still looking recognizably like themselves.”
For Co, healthy aging begins not with fighting age, but with understanding it.
NewsMakers
The look and feel of your neighborhood may affect your sleep
Those living in neighborhoods rated as having a stronger sense of safety tended to sleep longer, and that this rating appeared to be shaped by the streetscape.
Your neighborhood’s “streetscape”—the physical environment of your street—is something that you have probably never consciously thought about, despite seeing it every day. But what if the streetscape was affecting you on a subconscious level and disrupting your sleep?
This intriguing question is posed by the findings of a study led by Professor Daisuke Matsushita of the Graduate School of Human Life and Ecology at Osaka Metropolitan University. The research team used AI to analyze more than 200,000 Google Street View images to identify visual neighborhood characteristics. They then linked these characteristics to the self-reported sleep of 1,089 working adults living on the lower floors of apartments in Tokyo, who were most likely to be affected by the streetscape.
They found that those living in neighborhoods rated as having a stronger sense of safety tended to sleep longer, and that this rating appeared to be shaped by the streetscape. Generally, people slept longer in areas with lots of greenery, such as leafy trees, on the street. Similarly, high “enclosure”—meaning many tall vertical buildings and few wide-open spaces—was also associated with longer sleep and fewer insomnia symptoms.
However, the study also made a surprising finding. The researchers found that highly walkable streetscapes, such as those with more sidewalks and traffic signs, were associated with a lowered sense of safety and shortened sleep duration.
This suggests that walkability does not always represent a reassuring environment. Instead, a possible explanation is that streets with extensive pedestrian infrastructure are often busier, more crowded, and used by more strangers, which may be perceived as less safe or less relaxing than quieter residential streets.
“This study demonstrates the potential for evaluating streetscape characteristics across large geographic areas in a cost-effective manner,” Dr. Matsushita said. “Based on the technique used in this study, cities could potentially measure perceived safety, beauty, liveliness, and enclosure as well as pollution and noise.”
“We hope that opening up this new perspective creates further possibilities for designing healthier neighborhoods,” he concludes.
The findings were published in Building and Environment.
NewsMakers
Workout or nap? Either can help your sleepless brain, study finds
People who either completed 20 minutes of moderate-to-vigorous exercise or took a 90-minute nap performed about 22 per cent better on memory tests after 30 hours without sleep than those who did neither.
A short workout or a nap can help protect memory after a sleepless night, a McGill University-led study has found.
Researchers found people who either completed 20 minutes of moderate-to-vigorous exercise or took a 90-minute nap performed about 22 per cent better on memory tests after 30 hours without sleep than those who did neither. The findings, published in Proceedings of the National Academy of Sciences (PNAS), point to practical ways to counter the effects of sleep deprivation.
“Sleep loss affects nearly every aspect of how we think and function, but many people can’t simply stop what they’re doing and get more sleep,” said senior author Marc Roig, Professor in McGill’s School of Physical and Occupational Therapy. “Our findings show that even a brief bout of exercise may help preserve one of our most important cognitive abilities.”
The study involved 54 healthy young adults who stayed awake for 30 consecutive hours under lab supervision. Participants were then assigned to one of three groups: a 20-minute cycling session, a 90-minute nap or a control condition. Three days later, researchers tested their memory for images they had viewed immediately after the intervention. Those who exercised or napped remembered significantly more images than participants who did neither.
Same result, different pathways
While the memory benefits were nearly identical, brain recordings revealed that exercise and napping helped in different ways.
Napping appeared to help the brain recharge, making it easier to take in and remember new information. Exercise, by contrast, helped the brain use its remaining resources more efficiently, without making participants feel more tired.
The findings could eventually inform fatigue-management strategies in workplaces where sleep loss is common and mistakes can have serious consequences, such as health care, transportation and emergency response.
“A nap isn’t always possible in the middle of a shift,” said first author Madhura Lotlikar, a doctoral candidate in McGill’s Department of Neurology and Neurosurgery. “Exercise is accessible, inexpensive and easy to implement. That makes it a promising tool to help people stay cognitively sharp when sleep is limited.”
The researchers emphasize that exercise cannot replace sleep, but it may help people function better when getting enough rest isn’t possible.
About the study
“Protecting episodic memory after sleep loss: Similar benefits of exercise and naps via distinct neural contributions” by Madhura Lotlikar and Marc Roig et al., was published in Proceedings of the National Academy of Sciences of the United States of America.
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