Seven-time Tour de France champion Lance Armstrong said he\'ll tackle another Xterra all-terrain three-discipline race in Hawaii next week. \"Xterra World Champs next wknd. I\'m in! Looking fwd to racing,\" Armstrong said via Twitter on Sunday, a week before the swimming, cycling and running competition in Maui. Last month Armstrong was fifth in an Xterra race in Utah. He completed the 1,500-meter swim, a 28 km mountain bike ride and 9.8 km trail run in 2 hours, 29 minutes, 25 seconds. The event in Hawaii features a 1,500-meter swim, 29.5 km mountain bike ride and a 9.8 km run that covers terrain ranging from forest trails to sandy beaches.