WASHINGTON President scheduled for MRIs to determine source of knee pain

Earlier this year, Bush had a muscle tear that forced him to curtail his jogging.
WASHINGTON (AP) -- President Bush is showing up early for his visit with wounded soldiers at Walter Reed Army Medical Center so he can find out about a personal ailment: knee pain that has curtailed his jogging.
The 57-year-old president is having MRIs, or magnetic resonance imaging scans, taken of both his knees on the advice of his White House physician, Dr. Richard Tubb, White House press secretary Scott McClellan said Wednesday.
"When he's running, he feels occasional pain," McClellan said. "It's just become more noticeable over the last few months."
Bush already was scheduled to be at the medical center to visit soldiers wounded in Iraq and give a speech to about 200 members of the medical staff. The president also might drop in on Secretary of State Colin Powell -- if he's still there recovering from prostate cancer surgery on Monday.
Previous injury
Earlier this year, Bush suffered aching knees and a minor muscle tear in his right calf that forced him to give up his seven-minute-mile runs for several weeks. The calf strain was pronounced healed by the time Bush had his annual physical in early August. According to the doctors' report on the physical, the president takes chondroitin glucosamine, a joint relaxer.
In September, the president said he believed he had a a tear in his meniscus, a common injury to the cartilage that lines the inside surfaces of the knee. That again slowed his jogging regime.