Tag Archive for: respiratory infection

Immune System Training: Exercise vs. Meditation

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What’s going to work better to prevent acute respiratory infections: moderate exercise training or meditation training? Have you predicted which would be more effective without looking at the article? Or do you not have enough information yet? Let’s take a look at what each group did.

The moderate exercise group met for 2.5 hours each week with personnel trained in exercise physiology. The time was broken up into education about exercise and time practicing on different forms of equipment such as treadmills, exercise bikes, etc. The rest of the week, they exercised for 45 minutes per day. Most subjects used walking or jogging as their home modality of exercise. The subjects were trained to exercise at a moderate level based on the Borg perceived-exertion scale; once trained in assessing exertion, it matches up quite well with the effort people are actually performing during exercise.

The meditation group met with personnel trained in mindfulness-based stress reduction techniques for 2.5 hours a week. This program “is based on the idea that an increased awareness of physical, emotional, and cognitive manifestations of stress may lead to a healthier mind-body response to stress.” The subjects were also to practice the stress reduction techniques for 45 minutes every day at home.

The control group did not do either of the techniques. The training lasted for eight weeks. The variables I mentioned in Tuesday’s memo were collected before, during, and after completion of the eight weeks training. What were the results? I’ll give you a little more time to think about it and give you the answer on Saturday.

What are you prepared to do today?

        Dr. Chet

Reference: Ann Fam Med 2012;10:337-346. doi:10.1370/afm.1376.

Boosting Immune Function: Exercise vs. Meditation

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Every once in a while, I come across some research that’s just so interesting and unique, I have to share it with you. In this case, it’s directly related to boosting the immune system, which is what a lot of people are trying to do right now. In this case, researchers tested whether an eight-week program of either moderate exercise or meditation would reduce the variables associated with an acute respiratory infection such as time lost from work.

Researchers recruited subjects who did not get a flu vaccination and also did not exercise or meditate; they used just about every survey related to health that was available. They also took samples from nasal rinses after subjects had acquired an acute respiratory infection of any type and tested for markers of immune function in the rinses.

The mean age of the subjects was 59 years old. The subjects were randomly assigned to one of three groups: the control group who agreed to do nothing during the eight weeks; a group who would exercise at a moderate level; and a group who would participate in a specific type of meditation.

On Thursday, I’ll talk about the training programs. Looking ahead, short of looking up the paper itself, what do you think will be more effective: exercise or meditation to boost the immune system?

Insider Conference Call

Tomorrow night is the August Insider conference call. I’m going to do a COVID-19 update focusing on the recent spate of doctors plugging hydroxychloroquine as well as answering Insider questions. If you become an Insider by 8 p.m. ET, you can participate live!

What are you prepared to do today?

        Dr. Chet

Reference: Ann Fam Med 2012;10:337-346. doi:10.1370/afm.1376.

Travel Bugs: Everywhere but Planes

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Given the results of this study, where would a person most likely pick up a bug while traveling? Remember, the results of the air and physical locations of the plane that were tested and sent for analysis showed no measurable respiratory viruses of any kind, so the authors speculated about the most likely locations for picking up a virus. They believe you’re more likely to find a bug in transportation to the airport and then to the hotel. Or in the airport at a restaurant or store. In the gate area where people are less confined. In bathrooms where people are more likely to spread the virus to surfaces.

In other words, you can pick up a virus just about everywhere you can imagine but the plane. It’s a good idea to pay the closest attention outside the plane—keep your hand sanitizer handy and wash your hands often—and then don’t worry so much about the inside. Kids are a germ magnet at any time, so be extra vigilant when traveling.

You can also do what I do beginning the day before I leave for a trip: start taking echinacea, garlic, and extra vitamin C to boost your immune system. That’s my way of avoiding respiratory infections or any other form of illness when I travel. After 20 years on the road, it still serves me well. Get the details in the Health Info section of DrChet.com: Immune Boost 1-2-3. In it you’ll learn all about how to tune up your immune system to get ready to meet new germs and viruses, along with the latest info on echinacea, and one more step you can take to get your insides ready to hit the road.

What are you prepared to do today?

Dr. Chet

 

Reference: www.pnas.org/cgi/doi/10.1073/pnas.1711611115

 

The Safest Seat on a Plane

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If you want to boost your odds of remaining healthy after a flight, let’s begin with the location of your seating assignment. Researchers determined that the people in the center of coach had the most contacts with other passengers and flight crew. That makes sense. Everyone with the need is going forward or backward to use the bathrooms. But the contacts increase if the passengers leave their seats. In addition, there’s more contact with the crew in the center of the plane.

As to seat location, the aisle seats get the most contact with crew and passengers, the middle seats a little less. The seat with the least contact with passengers or crew is definitely the window seat; in fact, there are zero contacts about 10% of the time. The crew has the most direct contact with passengers; that’s to be expected as they distribute food and drinks, answer questions, and conduct safety checks.

Here’s the surprise: the results of the air and physical locations that were tested and sent for analysis showed no measurable respiratory viruses of any kind. That seems unusual because eight of the flights were during cold and flu season. But finding no viruses means they found no viruses using standard virus-detection tests. It should be noted they did not test for bacteria that could have been present, just respiratory viruses.

Based on the results, the researchers estimated that the major points of contact would be one meter in front and behind a sick passenger sitting in any row. If you were outside of that zone, you could be reasonably confident you didn’t catch a respiratory infection while on a flight, even if some of the passengers were infected with a respiratory virus. In this day and age, the fear of catching some form of respiratory superbug on a flight is extremely low.

Yet we know travel often results in illness. Where could people pick up a bug? I’ll let you know on Saturday.

What are you prepared to do today?

Dr. Chet

 

Reference: www.pnas.org/cgi/doi/10.1073/pnas.1711611115

Can Airline Travel Make You Sick?

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Have you ever flown for a vacation and found you were beginning to get a cold or other respiratory infection? How about when you fly for business? Just when you want to be at your peak, you’re feeling congested and beginning to cough. You immediately want to blame the flight for making you sick; after all, being in an enclosed area and breathing all that recycled air in a confined space, you obviously picked up a bug from another passenger. Is that a reasonable conclusion?

The risk of respiratory infection is on the minds of those of us who travel for business and pleasure—okay, maybe not the first thing we think about, but it’s on the list. With the possibility of infections being easy to transmit on flights, it’s a global concern as well. The airline manufacturers are concerned because they provide the delivery systems for billions of passengers. It’s also on the minds of researchers who want to know how infections are spread on planes.

Researchers from Emory University, Georgia Institute of Technology, and the Boeing Corporation sought to find out. Using prior research as a guide, they created a methodology of how to assess the course of respiratory infections. This is the kind of study research assistants dream about: they got to take 10 intercontinental flights from Atlanta to several West Coast locations. However, they were not just sitting quietly. They had to track the movement of every passenger and flight crewmember for the entire flight to monitor contacts between passengers and crew. And since they were on Boeing 757s, that’s quite a few passengers. Then they had to sample 22 different surfaces per flight.

I’ll let you know what they found on Thursday.

What are you prepared to do today?

Dr. Chet

 

Reference: www.pnas.org/cgi/doi/10.1073/pnas.1711611115