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Caffeine Eases Exercise-Induced Asthma

Caffeine taken within an hour of exercise can reduce symptoms of exercise induced asthma (EIA), characterised by shortness of breath during sustained aerobic activity.

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A large dose equal to nine mg of caffeine per kg of body weight was as effective as an albuterol inhaler in treating or preventing EIA. Smaller amounts also reduced wheezing, coughing and other symptoms of EIA.

Timothy Mickleborough, study co-investigator at Indiana University said no additional benefit was found when caffeine was combined with an albuterol inhaler.

Mickleborough and colleagues have been investigating the efficacy of a number of nutritional factors.

His research has shown that a diet high in fish oil and antioxidants and low in salt has the potential to reduce the severity of EIA and perhaps reduce the reliance on pharmacotherapy.

This is especially important since prolonged use of daily medications can result in reduced effectiveness, and there is growing concern about the potential side effects of inhaled corticosteroid use.

The study was presented at the American College of Sports Medicine conference in Indiana during the Respiratory Session.

Source: The Times Of India

What Causes Stress?

Regardless of the cause, stress sets in motion certain automatic changes in the body that are designed to give it a quick burst of energy. The pattern of changes has been called the “fight-or-flight” response because it most likely evolved from our prehistoric ancestors, who faced daily dangers in their search for food and shelter and had to either flee or do battle. Of course, we no longer face such dangers, but our bodies continue to react as if we did. So instead of responding to a saber-tooth tiger lurking behind a tree, the body reacts to petty annoyances like getting caught in traffic, being reprimanded by a supervisor, or worrying about bills.

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Regardless of the type of stress, the body goes through the following changes:

1.The adrenal glands release adrenaline and other stress hormones that prime certain organs to go into action.
2.The breathing becomes faster and more shallow to allow the body to take in more oxygen.
3.The liver releases more glucose (blood sugar) to provide extra energy.

4.The heart beats faster and blood pressure rises to increase the distribution of oxygen and nutrients throughout the body.
5.Blood flow to the brain and muscles is increased and, at the same time, reduced to digestive organs.
6.Sweating increases to allow the body to burn more calories without a rise in body temperature. (In theory, sweating also makes the skin slippery and more difficult for a predator to grab.)

After the stressor disappears, the body returns to its normal state (homeostasis). If, however, stress is chronic — as it is for many people — the body stays on high alert. The many damaging consequences include a rise in cholesterol levels, high blood pressure, damaged blood vessels, decreased mental skills, and a weakened immune system.

Source:Reader’s Digest

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