I had been out daily, doing about 3 miles a day either on an elliptical or speed walking, and all of a sudden my knees started really bothering me. There was pretty good aching involved, so I contacted Cedric to see if Real Time Pain Relief could help that. He told me that was what it was made for. I ordered it and started using it 2-3 times a day, and the aching subsided quickly! I just purchased more as I have continued using it a couple of times a day and it keeps on working! Thanks Cedric!