My friend asked me if my body is sending me a message. Why? Well, first there were blisters. Then the ball of my foot began to ache. And now my left knee hurts when I walk. I e-mailed my doctor about it. She answered, “Pain in the back of the knee can be caused by ligament strain or osteoarthritis. We do not recommend walking, hiking, or jogging in patients with hip/knee arthritis as it will make the arthritis worse. The good exercises are biking, swimming and water aerobics.” Is this the third strike or what: sore ball of the foot, blisters, and a sore knee? Is my body trying to tell me to stay home from my adventure waiting just four days away?