In the United States, nearly 6.5 million people aged 35 to 84 are expected to have osteoarthritis of the knee ten years into the future.
"The diagnosis of knee joint pain can be predicted in advance," said study author, Dr. Elena Losina, deputy director of the Center for Orthopedic and Arthritis Center for Outcomes Research at Brigham and Women's Hospital in Boston. He compared the age at diagnosis in the 1990s with age in the 2010s.
"The average age at diagnosis was moved from 69 years to 56 years," he said as quoted HealthDay.com, Monday (07/11/2011). These indications show that the joint pain began to attack earlier than average age.
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Losina found that adults aged 45 to 54 years will reach almost 5 percent of all cases of knee osteoarthritis in the 2010s, where in the 1990s, this age represents only 1.5 percent of patients with knee OA."Knee injury has been known to increase risk of knee arthritis. And some sports are riskier than others," said another researcher, Dr. Jeffrey Driban, an assistant professor at Tufts Medical Center in Boston.
He is reviewing several studies that looked at the relationship between exercise and osteoarthritis of the knee. He focuses on 16 research and then learn at 10 studies that look at osteoarthritis in athletes and not athletes.
Although no major differences in the amount of knee osteoarthritis in former sports players and not the athlete, he found there is the risk associated between certain types of sports and levels of participation.
Football players, both at the professional level or not, have a greater risk of knee osteoarthritis. Similarly athlete distance runners, weight lifters, and wrestlers. The increased risk of joint pain in athletes varies from three times to more than six-fold compared with non-athletes.
For those who already have osteoarthritis of the knee, is the best drug to lose weight if overweight and exercise.
In another study, Dr. Stephen Messier of Wake Forest University found that diet and exercise program to reduce pain and improve mobility as much as 50 percent in patients with knee arthritis.
He commissioned and divide adults who have knee osteoarthritis in a group to undergo the program for 18 months. One group was only doing the diet, an exercise only group, and one group exercise and diet.
399 men and women who are overweight with an average age of 66 years of successfully completing this program. Diet and exercise group lost the most weight, which is an average 11.4 percent body weight. Diet-only group lost 9.5 percent, while the exercise group lost only 2.2 percent.
When comparing between pain and mobility, diet and exercise group reported less pain and has a running speed is greater than any other group.
Driban suggested to reduce the risk of knee OA with exercise knee injury risk is lower, such as swimming and cycling. However, a specialist in sports medicine are less likely to agree with that.
"There is no evidence that exercise such as walking can cause joint pain in a healthy knee," said Dr. Stephen Nicholas, director of the Nicholas Institute of Sports Medicine and Athletic Trauma at Lenox Hill Hospital in New York City. Like other experts, he did not agree that once a knee injury occurs, then the person's risk of knee arthritis increases.
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