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Why the 12-3-30 Treadmill Workout Is Going Viral Again in 2025

Treadmill Workout

Fitness trends may come and go, but some workouts stand the test of time. The 12-3-30 treadmill workout is one such routine—making waves again in 2025 across TikTok, YouTube, and Instagram. Originally popularized by influencer Lauren Giraldo in 2019, this workout is now back in the spotlight, with a new generation of users swearing by … Read more

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