@run4prs: How often do YOU train hills? 🏔️🔥 Hills aren’t just for race prep — they’re a secret weapon for building strength, speed, and mental toughness 💪 Want to get faster? Add some elevation to your training! 👇 Drop your favorite hill workout below! #run4prs #teamrun4prs #hilltraining #strongerrunner #runnersofinstagram #marathontraining #speedwork