. >> justin gatlin. >> you're going into all different kind of environments all the time. i'm in jamaica right now. the next one. [ laughs ] in less than a week, i'll be in tokyo. you got to prepare your body to perform at the same level anywhere at any time. i'll put on my tommie copper shorts or tommie copper underwear, and i'll make sure that my body is relaxed, getting ready for the next day. once you're flying, ankles swell up, feet swell up, shoes feel tight on your feet, joints start to feel tight, so you want to make sure you have something that's gonna counter that, so i use the compression wear for that. once we land, we got almost 24 hours to 48 hours to get ready to run as fast as we can. you walk into the stadium, people stand up. having to start running, just get a better look at you and be excited. you're not just a runner. you're a performer. people have paid to come see you run for only 9 seconds. >> on your mark... set... [ gunshot ] >> don't just visualize yourself running the track, running your race. visualize feeling the impact of your foot touching t