I tried the 12-3-30 treadmill workout for 30 days – science reveals the catch
TikTok’s fitness world exploded when Lauren Giraldo’s simple treadmill routine promised effortless weight loss. Walk at 12% incline, 3 mph for 30 minutes daily. The result? A viral phenomenon with 3.5 billion views and countless transformation claims. But 2025 science reveals a shocking truth about this 12-3-30 method. The viral promise vs. the science reality … Lire plus









