Researchers measured cholesterol levels over 12 months in a group of 517 healthy volunteers. Average levels were 222 milligrams per deciliter (mg/dl) in men and 213 mg/dl in women. In winter, levels went up by 3.9 mg/dl in men, peaking in December, and by 5.4 mg/dl in women, peaking in January. The increases were highest among those who had high cholesterol to start with.
Why the difference? Researchers suspect that seasonal changes in plasma volume may account for much of the cholesterol increase found in winter months.
People who are depressed may benefit from a little exercise. The results of a survey by researchers at the Centers for Disease Control and Prevention show that individuals who do not exercise tend to experience more days when they feel sad. The findings, which were published in the online journal Health and Quality of Life Outcomes (2004; 2, 40), also show that incidents of depression increase as unhealthy behaviors increase. These behaviors include smoking, overeating and lack of sleep.
Which of your weekend warrior clients will be most likely to get injured? According to data from the U.S. Consumer Product Safety Commission, Allen Iverson wannabes are at the highest risk.
Pietro Tonino, MD, assistant professor of orthopedic surgery at Loyola University Chicago Stritch School of Medicine in Maywood, Illinois, analyzed new data and compiled the following list of sports with the largest number of injuries:
bicycle riding: 1,299,987
trampoline use: 244,564
horseback riding: 195,446
inline skating: 114,574
roller skating: 114,338
For more information and tips on injury prevention, visit www.luhs.org.
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In this course you'll learn goal-focused intervals and over 50 dynamic exercises and drills to create extensive and intensive training formats.
|Cut to the Core
This is a raw, unedited video filmed live at the 2009 IDEA World Fitness Convention™. Cut to the Core is packed full of core-focused exercises that aim to improve the way you look, feel and live.
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This continuing education quiz is an in-depth look at plyometric training. Plyometric exercises—jumping, bounding, hopping, arm pushing, and catching and throwing weighted objects such as machine balls—are movements that involve rapid eccentric and concentric muscle actions.