110131-N-2013O-293 YOKOSUKA, Japan (Jan. 31, 2011) Tony Horton, fitness guru and inventor of the workout system, P90X, motivates a Sailor performing an abdominal exercise during a command physical training session at Commander, Fleet Activities Yokosuka. Horton is in Japan on a tour sponsored by Armed Forces Entertainment. (U.S. Navy photo by Mass Communication Specialist 3rd Class Charles Oki/Released)