Experts say vigorous exercise can provide people with a boost to their immune systems.
A study by the London School of Hygiene and Tropical Medicine reveals that people who work out for at least two and a half hours a week are less likely to catch the flu.
Researchers polled more than 4,800 people on their health habits and found that those who exercised vigorously were about 10 percent less likely to come down with a flu-like illness.
This didn't work for people who did moderate exercise.
Previous research has found that high-intensity exercise is better than moderate exercise at improving the body's aerobic capacity, which is a marker of overall health and fitness.
As a result, the fitter you are, the more likely your immune system will be able to wipe out illness.
Electrocardiograms can help survive heart attacks
Quick action can increase your chances of surviving a heart attack.
A new study found patients who get an electrocardiogram in the ambulance have a better chance of surviving.
The test, which is also called an ECG, records heart rhythm and electrical activity. It can show if the patient actually had a heart attack.
The study was performed in the United Kingdom and included nearly half a million heart attack patients admitted to British hospitals.
In the United States, however, only about 25 percent of ambulance crews in the U.S. administer an ECG.
Smoking on TV may trigger it in adults
Kicking the smoking habit may be harder for older adults.
A study shows that watching smokers on television may trigger the urge to light up.
Over the 55 years studied, scientists found that for every hour of television programming that showed an instance of smoking, an adult would end up smoking two more packs of cigarettes per year.
Researchers also noted that smoking in real life and on TV both declined over that time period.