but take "last man standing" for example-
6 athletes who specialise in different sports(boxer,rugby player,footballer,modern pentathlete,wrestler and kite surfer) travel the globe and spend a week living with remote tribesmen while they learn the skills required to participate in their chosen sport(kushi wrestling,water buffalo racing,etc...)they then compete with the locals to see who is the best athlete.
now this show treads a fine line between being a reality show and a competition, i suppose it depends on your outlook.