What Fitness Experts Think of Lauren Giraldo's "12-3-30" Treadmill Workout
I tried the viral 12-3-30 workout for a month - why it really surprised me | Marie Claire UK
Is the TikTok-Famous 12-3-30 Workout Worth a Try? | Gallery posted by Rebecca | Lemon8
Horizon Fitness - You've likely heard of the 12-3-30 treadmill workout craze. What is it, exactly? 12% Incline 3.0 MPH Speed 30 Minutes It's easy enough to not be intimidating, but challenging