Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Scientists focusing on how exercise raises immunity

03.07.2003


An increasing number of doctors and other health experts have been encouraging older adults to rise from their recliners and go for a walk, a bike ride, a swim, or engage in just about any other form of physical activity as a defense against the potentially harmful health consequences of a sedentary lifestyle.



"Exercise is touted as a panacea for older adults," said Jeffrey Woods, a kinesiology professor at the University of Illinois at Urbana-Champaign, who noted that fitness programs are routinely recommended for people with various health problems -- from diabetes to heart disease.

Health experts generally recognize that this population benefits from physical fitness, he said. What they don’t know is why exercise appears to have certain preventive and restorative health effects. Also unknown is what -- if any -- relationship exists between exercise and immune functioning.


"Despite the numerous benefits of exercise -- for example, improving cardiovascular and muscular fitness -- we know very little about how exercise affects the immune systems of older adults," Woods said. "Good, bad or indifferent, this information could have important public health consequences for our aging population." For that reason, Woods and colleagues in the university’s kinesiology department are conducting research that seeks to establish the link between exercise training and immune function. The field, he said, is still in its infancy, with Illinois researchers among those who are defining it.

"Our laboratory is using both animal and human models to address the extent to which exercise affects immune functioning and susceptibility to infectious disease in older populations," Woods said. "We have obtained some exciting preliminary data in mice that suggest that moderate exercise or training may boost some immune function measures and reduce mortality caused by influenza. While we don’t have corollary evidence yet in people, we are in the midst of conducting a large clinical exercise trial in older adults, funded by the National Institute on Aging, that will provide definitive evidence as to whether moderate exercise training influences immune function."

In the meantime, results of one study conducted in Woods’ lab, published in the current online edition of the journal Brain, Behavior and Immunity, indicates that exercise training increases the ratio of naïve T cells to memory T cells in the spleens of older mice. The finding is potentially significant, he said, because, on this measure, "we turn old mice into young mice." When people and animals age, he explained, the thymus, which produces naïve T lymphocytes, shrinks, thus producing fewer naïve cells. "This is one reason that older people/animals have trouble responding to new environmental pathogens."

And with the recent appearance of so many new environmental pathogens -- from West Nile Virus to SARS and monkeypox -- Woods said the ability to boost the immune systems of the elderly, who are among the populations most at risk from infection, is a worthy goal.

Melissa Mitchell | EurekAlert!
Further information:
http://www.uiuc.edu/

More articles from Health and Medicine:

nachricht The genes are not to blame
20.07.2018 | Technische Universität München

nachricht Targeting headaches and tumors with nano-submarines
20.07.2018 | Universitätsmedizin der Johannes Gutenberg-Universität Mainz

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Future electronic components to be printed like newspapers

A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.

The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

A smart safe rechargeable zinc ion battery based on sol-gel transition electrolytes

20.07.2018 | Power and Electrical Engineering

Reversing cause and effect is no trouble for quantum computers

20.07.2018 | Information Technology

Princeton-UPenn research team finds physics treasure hidden in a wallpaper pattern

20.07.2018 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>