Okay I'm pretty amazed. I just ran 13 yesterday which I hadn't done in a looooong time. I used the Compex Sport to warmup before I went out and my legs felt great from the outset. I felt like I was running on air. Usually my legs take 2 miles to wake up. When I got back I did 20 minutes or so of Active Recovery. I knew something was different when I walked down a set of stairs last night. I was expecting to be sore from my run. Nope...felt great. Then I was expecting to be really sore today...again no. My legs feel great. Pretty amazing. I guess the Compex really does clear out the lactic acid as promised. Love it....do I dare sign up for next year's Rock N Roll with my new secret weapon?????