London’s air pollution problem means that for the city’s older adults exercise counts for nothing

A study has concluded that even short-term exposure to air pollution in built up areas like London’s Oxford Street can negate the beneficial health effects of exercise in older adults.

The research by Imperial College London and Duke University, and published in The Lancet, adds to the growing body of evidence showing the negative impacts of urban air pollution on cardiovascular and respiratory health, and highlights the need for stricter air quality limits and greater access to green spaces.

“It’s possible that studies such as this could support new air quality limits, it shows that we can’t really tolerate the levels of air pollution that we currently find on our busy streets,” said senior author Fan Chung, Professor of Respiratory Medicine and Head of Experimental Studies Medicine at National Heart & Lung Institute at Imperial College London.

Image courtesy of Ron Porter

For the study, funded by the British Heart Foundation, researchers recruited 119 volunteers, aged over 60, who were either healthy, had stable Chronic Obstructive Pulmonary Disease (COPD) or had stable heart disease.

The volunteers were then split into two groups. One of the groups walked for two hours in a relatively serene part of Hyde Park, while the second group walked along a busy stretch of Oxford Street – which has regularly breached air quality limits set by the World Health Organization.

Physical measurements were taken before and after the walks to show the effects of the exercise on cardiovascular health, including measurements of lung volume exhaled, blood pressure and the degree to which the blood vessels could expand.

Environmental measurements were also collected, to track pollution levels and volunteers’ exposure.

Image courtesy of David Holt

Analysis revealed that all participants benefitted from a stroll in the park, with lung capacity improving within the first hour and a significant lasting increase for more than 24 hours in many cases.

By comparison, a walk along Oxford Street led to only a small increase in lung capacity in participants, far lower than recorded in the park.

Blood flow also increased after exercise, with decreases in blood pressure and an increase in heart rate. Arteries became less stiff in those walking in Hyde Park with a maximum change from baseline of more than 24% in healthy and COPD volunteers, and more than 19% in heart disease patients.

This effect was drastically reduced when walking along Oxford Street, however, with a maximum change in arterial stiffness of just 4.6% for healthy volunteers, 16% for those with COPD and 8.6% for heart disease.

“These findings are important as for many people, such as the elderly or those with chronic disease, very often the only exercise they can do is to walk,” said Chung.

“Our research suggests that we might advise older adults to walk in green spaces, away from built-up areas and pollution from traffic.”

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An autonomous drone startup founded by former MIT researchers has today launched its R1, a fully autonomous flying camera that follows its subjects through dense and challenging environments.

In a promotional video, launched to introduce the autonomous camera, R1 can be seen following an athlete as she parkours her way through dense woodland.

The drone’s makers Skydio have explained that the camera combines artificial intelligence, computer vision, and advanced robotics and works by anticipating how people move, so R1 can make intelligent decisions about how to get the smoothest, most cinematic footage in real-time.

“The promise of the self-flying camera has captured people’s imaginations, but today’s drones still need to be flown manually for them to be useful,” said Adam Bry, CEO and co-founder of Skydio.

“We’ve spent the last four years solving the hard problems in robotics and AI necessary to make fully autonomous flight possible. We’re incredibly excited about the creative possibilities with R1, and we also believe that this technology will enable many of the most valuable drone applications for consumers and businesses over the coming years.”

Launching today is the Frontier Edition of R1, which is aimed at athletes, adventurers, and creators.

This version of R1 is powered by the Skydio Autonomy Engine, enabling it to see and understand the world around it so that it can fly safely at speeds of upto 25mph while avoiding obstacles.

The autonomous drone is fitted with 13 cameras, which gives it the ability to map and understand the world in real-time, allowing it to be fully autonomous and independently capture footage that in Skydio’s words “once required a Hollywood film crew” and will “enable a new type of visual storytelling”.

The R1 “Frontier Edition” is available for order now on Skydio’s website for $2,499.