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...common wisdom is that regular running or vigorous sport-playing during a person's youth subjects the joints to so much wear and tear that it increases his or her risk of developing osteoarthritis later in life. Research has suggested that may be at least partly true: in a study of about 5,000 women published in 1999, researchers found that women who actively participated in heavy physical sports in their teenage years or weight-bearing activities in middle age had a higher than average risk of developing osteoarthritis of the hip by age 50. (See the top 10 medical...
...nine-year study of 1,279 elderly residents of Framingham, Mass., resulted in similar findings: that the most active people had the same risk of arthritis as the least active. About 9% of the participants overall developed arthritis over the course of the study, as measured by symptoms reported to their physicians (pain and difficulty walking) as well as X-ray scans. And in the same year, Australian researchers writing in the journal Arthritis and Rheumatism found that people who exercised vigorously had thicker and healthier knee cartilage than their sedentary peers. That suggests the exercisers may have also enjoyed...
Together, the findings lend support to the theory that osteoarthritis, which affects nearly 20 million Americans, is caused mainly by genes and risk factors like obesity (obese men and women are at least four times as likely to become arthritic as their thinner peers), rather than daily exercise or wear and tear of joints. In fact, a "normally functioning joint can withstand and actually flourish under a lot of wear," says Fries. Because cartilage - the soft connective tissue that surrounds the bones in joints - does not have arteries that deliver blood, it relies on the pumping action generated by movement...
...journalists, this is standard procedure. You’re not obligated to tell the people you interview about the specific angle of your story. If you think it might alienate them, you often don’t tell, at least not at the beginning of the interview. If concealing information from a source means getting more or better information to the public, then journalists will do it—within certain bounds, of course. I could be vague; I wasn’t allowed...
Whatever his position in the Al Qaeda hierarchy, Awlaki had emerged as a major headache for U.S. officials. American-born and educated, he had contact with at least two 9/11 hijackers before fleeing the US in late 2001. In Yemen, he became something of an e-imam, using the internet to preach fiery anti-American and anti-West sermons. He called upon believers to rise up against the U.S. Because his sermons were published in English, he became popular with radical American Muslims. "He understood American society and was able to tailor his message to American audiences," says Hoffman...