'Permanent bone loss': Calgary study finds astronauts suffer on return to Earth - Cochrane Today | Canada News Media
Connect with us

Science

'Permanent bone loss': Calgary study finds astronauts suffer on return to Earth – Cochrane Today

Published

 on


CALGARY — The experience may be out-of-this-world but research indicates those who travel to outer space suffer from increased bone loss. 

A study released Thursday from the Cumming School of Medicine at the University of Calgary followed 17 astronauts before and after their spaceflights. 

The TBone study, conducted over a seven-year period starting in 2015, found that prolonged weightlessness accelerated bone loss in the astronauts. 

“You see on average they lose about two decades of bone. We found that weight-bearing bones only partially recovered in most astronauts one year after spaceflight,” said Dr. Leigh Gabel, an assistant professor in the faculty of kinesiology and lead author of the study. 

“After a year of recovery, they tend to regain about half of that. This suggests the permanent bone loss due to spaceflight is about the same as a decade worth of age-related bone loss on Earth.” 

The researchers travelled to Johnson Space Center in Houston to scan the wrists and ankles of the astronauts before they left for space, on their return to Earth, after six months and then one year. 

The findings, published in Scientific Reports, said the loss happens because bones that would normally be weight-bearing on Earth, such as the legs, don’t have to carry weight in a zero-gravity setting. 

“We’ve seen astronauts who had trouble walking due to weakness and lack of balance after returning from spaceflight to others who cheerfully rode their bike on Johnson Space Center campus to meet us for a study visit,” said Dr. Steven Boyd, director of the McCaig Institute for Bone and Joint Health and professor in the Cumming School of Medicine. 

“There is quite a variety of response among astronauts when they return to Earth.” 

Boyd said new scanning technology has made a world of difference.

“We’re using new technology that can measure the fine details of the bone that are even finer than a human hair in terms of resolution. We can see detail there that wasn’t possible to see before in these astronauts.”

The study found some astronauts who flew on shorter missions — under six months — recovered more bone strength and density in the lower body compared to those who flew for longer durations. 

The study’s next iteration plans to look at the effects of even longer trips to support astronauts who may one day travel beyond the International Space Station. 

“NASA’s really interested in understanding if longer-term spaceflight could lead to even further bone loss, which would not be very good for the astronaut,” said Boyd.

“The next phase is to do a study that would incorporate crew members who spend a year on the International Space Station, which will give us some more insight on whether you lose even more bone after that one year period.”

The University of Calgary’s former chancellor and astronaut, Robert Thirsk, said he knows how difficult it can be to be back on solid ground. 

“Just as the body must adapt to spaceflight at the start of a mission, it must also readapt back to Earth’s gravity field at the end,” he said. 

“Fatigue, light-headedness and imbalance were immediate challenges for me on my return. Bones and muscles take the longest to recover following spaceflight. But within a day of landing, I felt comfortable again as an Earthling.” 

The study was funded by the Canadian Space Agency in partnership with the European Space Agency, NASA and astronauts from North America, Europe, and Asia. 

This report by The Canadian Press was first published June 30, 2022. 

Bill Graveland, The Canadian Press

Adblock test (Why?)



Source link

Continue Reading

Science

The body of a Ugandan Olympic athlete who was set on fire by her partner is received by family

Published

 on

 

NAIROBI, Kenya (AP) — The body of Ugandan Olympic athlete Rebecca Cheptegei — who died after being set on fire by her partner in Kenya — was received Friday by family and anti-femicide crusaders, ahead of her burial a day later.

Cheptegei’s family met with dozens of activists Friday who had marched to the Moi Teaching and Referral Hospital’s morgue in the western city of Eldoret while chanting anti-femicide slogans.

She is the fourth female athlete to have been killed by her partner in Kenya in yet another case of gender-based violence in recent years.

Viola Cheptoo, the founder of Tirop Angels – an organization that was formed in honor of athlete Agnes Tirop, who was stabbed to death in 2021, said stakeholders need to ensure this is the last death of an athlete due to gender-based violence.

“We are here to say that enough is enough, we are tired of burying our sisters due to GBV,” she said.

It was a somber mood at the morgue as athletes and family members viewed Cheptegei’s body which sustained 80% of burns after she was doused with gasoline by her partner Dickson Ndiema. Ndiema sustained 30% burns on his body and later succumbed.

Ndiema and Cheptegei were said to have quarreled over a piece of land that the athlete bought in Kenya, according to a report filed by the local chief.

Cheptegei competed in the women’s marathon at the Paris Olympics less than a month before the attack. She finished in 44th place.

Cheptegei’s father, Joseph, said that the body will make a brief stop at their home in the Endebess area before proceeding to Bukwo in eastern Uganda for a night vigil and burial on Saturday.

“We are in the final part of giving my daughter the last respect,” a visibly distraught Joseph said.

He told reporters last week that Ndiema was stalking and threatening Cheptegei and the family had informed police.

Kenya’s high rates of violence against women have prompted marches by ordinary citizens in towns and cities this year.

Four in 10 women or an estimated 41% of dating or married Kenyan women have experienced physical or sexual violence perpetrated by their current or most recent partner, according to the Kenya Demographic and Health Survey 2022.

The Canadian Press. All rights reserved.

Source link

Continue Reading

News

The ancient jar smashed by a 4-year-old is back on display at an Israeli museum after repair

Published

 on

 

TEL AVIV, Israel (AP) — A rare Bronze-Era jar accidentally smashed by a 4-year-old visiting a museum was back on display Wednesday after restoration experts were able to carefully piece the artifact back together.

Last month, a family from northern Israel was visiting the museum when their youngest son tipped over the jar, which smashed into pieces.

Alex Geller, the boy’s father, said his son — the youngest of three — is exceptionally curious, and that the moment he heard the crash, “please let that not be my child” was the first thought that raced through his head.

The jar has been on display at the Hecht Museum in Haifa for 35 years. It was one of the only containers of its size and from that period still complete when it was discovered.

The Bronze Age jar is one of many artifacts exhibited out in the open, part of the Hecht Museum’s vision of letting visitors explore history without glass barriers, said Inbal Rivlin, the director of the museum, which is associated with Haifa University in northern Israel.

It was likely used to hold wine or oil, and dates back to between 2200 and 1500 B.C.

Rivlin and the museum decided to turn the moment, which captured international attention, into a teaching moment, inviting the Geller family back for a special visit and hands-on activity to illustrate the restoration process.

Rivlin added that the incident provided a welcome distraction from the ongoing war in Gaza. “Well, he’s just a kid. So I think that somehow it touches the heart of the people in Israel and around the world,“ said Rivlin.

Roee Shafir, a restoration expert at the museum, said the repairs would be fairly simple, as the pieces were from a single, complete jar. Archaeologists often face the more daunting task of sifting through piles of shards from multiple objects and trying to piece them together.

Experts used 3D technology, hi-resolution videos, and special glue to painstakingly reconstruct the large jar.

Less than two weeks after it broke, the jar went back on display at the museum. The gluing process left small hairline cracks, and a few pieces are missing, but the jar’s impressive size remains.

The only noticeable difference in the exhibit was a new sign reading “please don’t touch.”

The Canadian Press. All rights reserved.

Source link

Continue Reading

News

B.C. sets up a panel on bear deaths, will review conservation officer training

Published

 on

 

VICTORIA – The British Columbia government is partnering with a bear welfare group to reduce the number of bears being euthanized in the province.

Nicholas Scapillati, executive director of Grizzly Bear Foundation, said Monday that it comes after months-long discussions with the province on how to protect bears, with the goal to give the animals a “better and second chance at life in the wild.”

Scapillati said what’s exciting about the project is that the government is open to working with outside experts and the public.

“So, they’ll be working through Indigenous knowledge and scientific understanding, bringing in the latest techniques and training expertise from leading experts,” he said in an interview.

B.C. government data show conservation officers destroyed 603 black bears and 23 grizzly bears in 2023, while 154 black bears were killed by officers in the first six months of this year.

Scapillati said the group will publish a report with recommendations by next spring, while an independent oversight committee will be set up to review all bear encounters with conservation officers to provide advice to the government.

Environment Minister George Heyman said in a statement that they are looking for new ways to ensure conservation officers “have the trust of the communities they serve,” and the panel will make recommendations to enhance officer training and improve policies.

Lesley Fox, with the wildlife protection group The Fur-Bearers, said they’ve been calling for such a committee for decades.

“This move demonstrates the government is listening,” said Fox. “I suspect, because of the impending election, their listening skills are potentially a little sharper than they normally are.”

Fox said the partnership came from “a place of long frustration” as provincial conservation officers kill more than 500 black bears every year on average, and the public is “no longer tolerating this kind of approach.”

“I think that the conservation officer service and the B.C. government are aware they need to change, and certainly the public has been asking for it,” said Fox.

Fox said there’s a lot of optimism about the new partnership, but, as with any government, there will likely be a lot of red tape to get through.

“I think speed is going to be important, whether or not the committee has the ability to make change and make change relatively quickly without having to study an issue to death, ” said Fox.

This report by The Canadian Press was first published Sept. 9, 2024.

The Canadian Press. All rights reserved.

Source link

Continue Reading

Trending

Exit mobile version