"Thank you for allowing me to try out the Q-Link Pendant. I started wearing it while training for the Honolulu Marathon. I am generally skeptical of these kinds of devices but I must say that my training seemed to be much easier than ever before. Also, while running in the marathon, for the first time ever, I didn't hit the "wall". I felt great during and after the marathon. Either I'm getting stronger and better in my old age or there is something magical about the Q-Link Pendant."