Sunday October 21, 2018

High-intensity Aerobic Exercise likely to Reverse Aging: Researchers

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A new study suggests high-intensity aerobic exercise may reverse aging. (Photo by Flickr user Global Panorama via Creative Commons License) VOA
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March 13, 2017: The good news is that researchers say they have found a way that may reverse aging for older people. The bad news is you are going to have to hit the gym for some high-intensity aerobic training to do it.

For the study, researchers from the Mayo Clinic compared three types of exercise: high-intensity interval training, resistance training and a combination of the two. They found that only high-intensity interval training and combined training “improved aerobic capacity and mitochondrial function for skeletal muscle,” with mitochondrial function being a common problem for older adults.

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“We encourage everyone to exercise regularly, but the take-home message for aging adults that supervised high-intensity training is probably best, because, both metabolically and at the molecular level, it confers the most benefits,” saysK. Sreekumaran Nair, M.D., Ph.D., a Mayo Clinic endocrinologist and senior researcher on the study.

He added that high-intensity training appears to reverse some aspects of aging and warned that resistance training is also important for increasing muscle strength, suggesting hitting the weights “a couple of days a week.”

Specifically, researchers found that high-intensity interval training reversed aging by improving muscle protein content, which improved “energetic functions” and caused muscle enlargement in older adults.

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It also improved cells’ ability to make new proteins, which reverses a “major adverse effect of aging.”

The study monitored older and younger adults who were divided into groups to do each of the three types of exercise over 12 weeks. Researchers then gathered health information 72 hours after participants completed a type of exercise.

The findings were published in the journal Cell Metabolism. (VOA)

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USA: Everything you want to know about Security Clearance; Find out here!

A security clearance allows a person access to classified national security information or restricted areas.

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Former CIA Director John O. Brennan speaks at the Council on Foreign Relations in Washington, March 11, 2014. President Donald Trump revoked Brennan's security clearance Wednesday. VOA
Former CIA Director John O. Brennan speaks at the Council on Foreign Relations in Washington, March 11, 2014. President Donald Trump revoked Brennan's security clearance Wednesday. VOA

U.S. President Donald Trump on Wednesday revoked the security clearance of former CIA Director John Brennan. We take a look at what that means.

What is a security clearance?

A security clearance allows a person access to classified national security information or restricted areas after completion of a background check. The clearance by itself does not guarantee unlimited access. The agency seeking the clearance must determine what specific area of information the person needs to access.

What are the different levels of security clearance?

There are three levels: Confidential, secret and top secret. Security clearances don’t expire. But, top secret clearances are reinvestigated every five years, secret clearances every 10 years and confidential clearances every 15 years.

All federal agencies follow a list of 13 potential justifications for revoking or denying a clearance. VOA
All federal agencies follow a list of 13 potential justifications for revoking or denying a clearance. VOA

Who has security clearances?

According to a Government Accountability Office report released last year, about 4.2 million people had a security clearance as of 2015, they included military personnel, civil servants, and government contractors.

Why does one need a security clearance in retirement?

Retired senior intelligence officials and military officers need their security clearances in case they are called to consult on sensitive issues.

Also Read: Governments Across The World Request Apple for 30,000 Device Information

Can the president revoke a security clearance?

Apparently. But there is no precedent for a president revoking someone’s security clearance. A security clearance is usually revoked by the agency that sought it for an employee or contractor. All federal agencies follow a list of 13 potential justifications for revoking or denying a clearance, which can include criminal acts, lack of allegiance to the United States, behavior or situation that could compromise an individual and security violations. (VOA)