简介：Sincethethemefortheyearisbattleoftheages,thefifteencontestants,whoaredroppedinthemiddleoftheCaliforniadesertontheirfirstmeeting,areseparatedintothreeteamsbasedonage:underthirty,overfifty,andthosein-between.Eachteamwillrunamileraceacrossthedesertasateamtobeabletochoosetheirteamtrainer:Anna'sblueteam,Bob'sblackteam,andDolvett'sredteam.Attheendoftherace,theylearnthattheywillallbebacktothatspotjustbeforethefinaletorunamarathon,thewinnerofthatracetobecomeanautomaticfinalistnomatterifhe/shehasalreadybeeneliminated.Thefirstworkoutisaneyeopeningexperienceformost,butespeciallyforanex-professionalathletewhoendedupbeinginworseshapethanheeverimagined.Inthemiddleoftheweek,onecontestantreceivessomebadnewsfromhome,whichendsupbeingafocusingexperience.Thefirstweigh-inyieldsmixedresults,whichinturnleadstothefirsteliminated...…