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Lead Stories: Monday, December 1, 2008

Partial Knee Replacement: Less Pain, but Not for Everyone

Posted September 4th, 2007 at 9:35 AM by Hariz Siddiqui

Section: Health & Fitness, Injury & Rehab

partial knee replacement diagram image knee joint The ends of bones are soft, so they must be covered with a thick white gristle called cartilage. Many people suffer from knee pain because the cartilage is damaged. They may have osteoarthritis in which the cartilage wears away, or they may have damaged cartilage in an accident or by playing sports. Once damaged, cartilage can never heal; the person spends the rest of his life losing cartilage until the cartilage is completely gone and the knee hurts 24 hours a day.

Until recently, the only effective treatment has been to cut out the ends of the bones of the knee and replace the entire knee joint. Now for some people, a simpler procedure may be effective: partial knee replacement, called unicompartmental knee arthroplasty. The surgeon removes just part of the cartilages and bones on the upper and lower legs on one side of the knee.
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Will exercising at night keep me from sleeping?

Posted January 3rd, 2007 at 7:00 AM by Martha Jones

Section: Health & Fitness, Exercise

Many fitness instructors give bad advice when they tell you not to exercise within three hours before going to sleep. Several studies show that exercising vigorously before going to bed does not interfere with sleep.

One study from the University of California at San Diego showed that three hours of vigorous pedaling at 70 percent of maximum oxygen uptake in very bright lights did not stop fit men from falling or staying asleep.
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Will cross-training
make me more fit?

Posted December 30th, 2006 at 12:00 PM by Martin Kennedy

Section: Health & Fitness, Exercise

Fitness refers to your heart, and the harder you exercise, the more fit you become. But every time you exercise vigorously your muscles are injured, and the harder you exercise, the longer it takes for your muscles to heal. Muscle biopsies done the day after a person exercises vigorously show bleeding into the muscles and disruption of the Z-bands that hold muscle filaments together. You are not supposed to exercise vigorously again until the muscle soreness disappears.
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