Nike is continuing its run of ads celebrating its ‘Just Do It’ slogan with a campaign celebrating the innate talent of middle-distance runner Caster Semenya, who was subjected to sex testing in 2009.The International Association of Athletics Federations scrutinised the South African Olympian for her unnaturally quick pace, a talent that was attributed to her high levels of naturally occurring testosterone.Nike’s latest work twists the questions regarding the fairness of her competing against other women with the statement: ‘When you’re born to do it, just do it.’The latest film from the sports brand follows Semenya throughout her life: from her first steps as a baby to winning an international race. Yet from the moment her Nike trainer crosses the finish line, the film begins rewinding in slow motion.Semenya’s journey to gold plays backwards as her voiceover asks: “Would it be easier for you if I wasn’t so fast? Would it be simpler if I stopped winning? Would you be more comfortable if I was less proud? Would you prefer if I hadn’t worked so hard, or just didn’t run? Or chose a different sport? Or stopped at my first steps?“That’s too bad because I was born to do this.”Nike hopes the film from director AG Rojas will convey a ‘sense of tenacity’. The spot was created by Wieden+Kennedy Amsterdam, which also produced a double-page print ad as part of the campaign.The latter was printed as a double page spread in South African newspaper WHAT. The copy, which appears in the wake of Semenya’s speed, reads: ‘Too fast? Too bad.’CreditsExecutive Creative Director: Eric Quennoy, Mark BernathCreative Director; Evgeny Primachenko, Hannah Smit, Craig WilliamsArt Director: Teresa MontenegroCopywriter: Christopher CryerHead of Production: Joe TogneriExecutive Producer Broadcast: Michael MacMillanBroadcast Producer: Magda CzyzExecutive Producer Art: Maud KlarenbeekArt Producer: Kate Barrett, Stacey PruddenPlanning Director: Stephane MissierCommunications Planner Director: Hillary HeathGroup Account Director: Kathryn AddoAccount Director: Amber MartinAccount Manager: Cassandre Beck, Molly RuggHead of Design: Joe BurrinStudio Director: Lizzie MurrayDesigner: Gustav von PlatenStudio Artist: Noa RederoProject Manager: Loes PootBusiness Affairs: Fiona FanPRODUCTION COMPANY: PARK PICTURESDirector: AG RojasDirector of Photography: Rina YangProducer: Nick GoldsmithExecutive Producer: Stephen BrierleyEDITING COMPANY: TRIM EDITINGEditor: Dominic LeungEditor Assistant: Dave DavisProducer: Tatyana AlexandraAUDIO POST: WAVE STUDIOSSound Designers; Ed Downham, Alex Nicholls-LeeMUSICArtist: Cam BallantyneTitle: CasterStudio: BeatwormsPOST PRODUCTION: GLASSWORKS AMSTERDAM VFX Supervisor / Lead compositor: Kyle ObleyCompositor: Jan van de LaarOn set VFX Supervisor: George WebsterColourist: Scott HarrisExecutive Producer: Anya KruzmetraProduction Coordinator: Salt Ibraeva