Why a walk in the park beats a stroll on the street

UNTV News   •   December 25, 2017   •   3457

People walk under cherry blossoms inside a public park on a spring day in Lausanne April 6, 2010. REUTERS/Denis Balibouse

(Reuters Health) — Older adults who take a daily constitutional may want to avoid traffic-jammed city streets and head to a park instead because polluted air diminishes the benefits of exercise, a UK study suggests.

Researchers in London randomly assigned 119 men and women age 60 or older to take two-hour walks along one of two distinct routes: through a tranquil traffic-free expanse of Hyde Park, or along Oxford Street, the city’s bustling shopping district that’s clogged with diesel-powered buses and cabs.

The study team tested the air for contaminants during each walk, and also assessed participants for lung capacity, or how easily people could breathe, and arterial stiffness, which influences how hard the heart works to pump blood through the body.

After walking in Hyde Park, healthy participants had better lung capacity and decreased arterial stiffness, the study found. But when these people walked along Oxford Street, they experienced only a slight improvement in lung capacity and their arteries got stiffer.

“Just walking at a normal pace for a couple of hours benefits the respiratory and cardiovascular system for up to 24 hours after the walk,” said senior study author Kian Fan Chung of Imperial College London.

“This in itself is a new finding, but the most interesting finding is that being exposed during that time to environmental pollution that one encounters on a busy roadside with a lot of traffic virtually negates these benefits,” Chung said by email.

Exercise has long been linked to better cardiovascular health, and the connection between air pollution exposure and a wide range of health problems including asthma and other breathing issues is also well established.

Black soot and fine particulate matter, as well as contaminants in traffic fumes, can increase the risk of getting a variety of heart and lung diseases and of dying from them.

Air pollution is responsible for around 5.5 million premature deaths worldwide every year, researchers note in The Lancet. In the UK, polluted air contributes to 40,000 deaths each year, nearly a quarter of them in London.

The current study offers fresh evidence that short-term exposure to pollution is associated with stiffening of the arteries and impaired lung function, strengthening the case for reduced vehicle emissions and more green space for exercise in cities, the researchers argue.

All of the participants in the study were non-smokers or had quit at least one year earlier. While 40 of them were healthy, 39 participants had heart disease and 40 had a breathing disorder known as chronic obstructive pulmonary disease (COPD).

Participants were randomly assigned first to do a walk in Hyde Park or on Oxford Street, then three to eight weeks later they were asked to do the other walk.

The detrimental effects of walking near traffic were most pronounced in people with COPD. These participants reported more symptoms like cough, shortness of breath and breathing after the walk on Oxford Street than in Hyde Park, and they also experienced increased arterial stiffness.

For people with heart disease, however, medication mattered. Among these participants, people only experienced increased stiffening of the arteries on Oxford Street if they weren’t taking medication to control their disease.

Based on air quality tests during each walk, it appeared that the harmful effects of walking on Oxford Street were associated with higher exposure to two byproducts of traffic exhaust: black carbon soot and ultrafine particles in the air known as PM 2.5.

One limitation of the study is that it lacked a control group of people who spent time on Oxford Street or in Hyde Park without exercising, which makes it impossible to prove how much the physical activity contributed to any changes in lung capacity or arterial stiffness, the authors note.

Even so, the study adds to the evidence that the location of exercise matter, said Dr. Dr. George Thurston, author of an accompanying editorial and director of the Program in Human Exposures and Health Effects at New York University School of Medicine.

“Given that the elimination of fossil fuel burning will not happen immediately, the public, and especially people who are most susceptible should avoid exercising near roadways with heavy traffic of diesel vehicles,” Thurston said by email.

SOURCES: bit.ly/2pcgYRR and bit.ly/2kAal6V The Lancet, online December 5, 2017.

Iraqis defy tear gas, upcoming curfew as protests stretch on

Robie de Guzman   •   October 29, 2019

 Iraqi protesters react after police fired tear gas at them during a protest at al-Tahrir square, central Baghdad, Iraq, 28 October 2019. EPA-EFE/MURTAJA LATEEF

Thousands of people in Baghdad continued their protests at Tahrir Square in central Baghdad on Monday (October 28), defying a curfew scheduled to be imposed from midnight until 6am (2100GMT to 0300 GMT).

Protesters took to the streets for a fourth day, despite having endured bloody clashes over the weekend and an overnight raid by security forces seeking to disperse them.

At least 74 Iraqis were killed and hundreds wounded across the country on Friday (October 25) and Saturday (October 26) as demonstrators clashed with security forces and militia groups in the second wave of this month’s protests against Prime Minister Adel Abdul Mahdi’s government.

More than 200 people have been killed in October so far.

Iraqi security forces on Monday fired tear gas at school and university students who defied a warning from the prime minister and joined anti-government protests.

A spokesman for Abdul Mahdi, whose position is increasingly precarious as he faces the largest challenge since he came to power a year ago, said on Sunday (October 27) that anyone disrupting work or school days would be severely punished.

Mass street protests in Baghdad and other cities in the southern Shi’te heartland against economic hardship began at the start of the month and resumed on Friday after a pause of about two weeks. (Reuters)

READ: DFA cautions Filipinos against travel to Iraq

(Production: Haider Kadhim, Mohammed Al-Ramahi, Mohammed Katfan, Hannah Ellison)

TAGS   , ,

US Military: No footage on Baghdadi’s death will be released

Robie de Guzman   •   October 29, 2019

US President Donald J. Trump answers a reporter’s question as he participates in a briefing with senior military leaders in the Cabinet Room of the White House in Washington, DC, USA, on 07 October 2019. At right is United States Army General Mark A. Milley, Chairman of the Joint Chiefs of Staff. EPA-EFE/Ron Sachs

Islamic State (IS) leader Abu Bakr al-Baghdadi’s remains had been disposed of and there were no plans to share footage on his death, Chairman of the Joint Chiefs of Staff Mark Milley announced on Monday.

U.S. President Donald Trump said on Sunday that al-Baghdadi had been killed in a U.S. military operation in Syria.

Trump said earlier that part of the footage on the operation would be released, but military sources said that the footage might expose some confidential information about the U.S. military, adding that the footage should go through strict checks before it is published.

The Associated Press on Monday released footage taken by a witness when the U.S. military launched a raid in northwestern Syria — but the authenticity of the footage has not been verified.

Kremlin spokesman Dmitry Peskov on Monday expressed “prudent welcome” to Baghdadi’s death, saying the U.S. has made a big contribution to fighting terrorism “if confirmed”.

The Russian Defense Ministry said on Sunday that it does not have reliable information about the U.S. operation in the Idlib de-escalation zone in Syria that allegedly killed IS leader Abu Bakr al-Baghdadi.

Iranian Foreign Ministry Spokesman Abbas Mousavi on Monday stressed that the extremist ideology and the support for it still exist in the Middle East, and the death of Baghdadi was a “creature” killed by the U.S.

On the same day, Iranian government Spokesman Ali Rabiee said al-Baghdadi’s death is the end of a symbol of “destructive terrorism,” and the U.S. should end its interventions in the Middle East. (Reuters)

Tokyo 2020 gymnastics, boccia venue unveiled

Robie de Guzman   •   October 29, 2019

The Tokyo Organising Committee of the Olympic and Paralympic Games (Tokyo 2020) on Tuesday (October 29) unveiled the new Ariake Gymnastics Centre, which will host Gymnastic and Boccia events during the Tokyo 2020 Games.

The 12,000-seat, 30-meter height venue, whose construction was completed on 25 October, has no pillar in the performance area.

The central element of the architecture is a 90-meter spanned, local larch wood roof that arches over the building’s core.

Timbers of Larch were all domestically sourced including from Hokkaido, Nagano and Miyazaki prefectures to name a few.

The venue, located in the Ariake district of the Japanese capital that will host many other Olympic events, will be also used as an exhibition center when the Games are over.

One of the Tokyo 2020 officials at a press viewing of the venue, Koichi Fukui, told reporters that wood materials would eventually be used as partitions at exhibitions and all the bench boards would be recycled into shoe shelves for schools.

The venue will host the 34th FIG Trampoline Gymnastics World Championships in November. (Reuters)

(Production: Akira Tomoshige, Yoko Kono)

REACH US

The Philippine Broadcast Hub

UNTV, 915 Barangay Philam,

EDSA, Quezon City M.M. 1104

(+632) 8396-8688 (Tel)

(+632) 8920.8336 (Fax)

info@untvweb.com (General inquiries)

support@untvweb.com

UNTV News and Rescue Emergency Hotlines:

LANDLINE (+632) 8396-8688

ADVERTISE WITH US

(+632) 8 442.6244 Loc. 143, 144, 162, 164

advertising@untvweb.com

ABOUT UNTV

UNTV is a major TV broadcast network with 24-hour programming. An Ultra High Frequency station with strong brand content that appeal to everyone, UNTV is one of the most trusted and successful Philippine networks that guarantees wholesome and quality viewing experience.