Pop superstar Harry Styles isn’t just running the charts—he’s literally running marathons. AdvertisementHarry Styles completed the Berlin marathon in under 3 hours. pic.twitter.com/PJrxsAylh0 — Buzzing Pop (@BuzzingPop) September 21, 2025The Berlin course is famous for being flat and lightning fast—it’s where marathon world records keep getting shattered. Enter his secret weapon: personal trainer Thibo David. According to Thibo, Harry’s training is all about endurance, injury prevention, and mental strength.