One could argue that Yu Yumoto, a medical student at Juntendo University in Tokyo and one of Xterra’s more enthusiastic proponents, both in Japan and abroad, has a genetically inherited need for speed and racing on the edge. It would be a purely unscientific debate of course, but there does seem to be something in the Yumoto family that a nicotine-like patch for adrenaline might help temper. http://www.vereinsmeier.at/real/48895/doku/KOTRV-Medieninfo55-2007vom25.10.2007.pdf