A fitness trend that took TikTok by storm, racking up more than 14 million views, may have some science behind it. The 12-3-30 treadmill workout, popularized by influencer Lauren Giraldo, promises a ...

The ProForm Pro 9000 Treadmill is an eye-catching and well-equipped bit of kit that suits just about any workout, with access to thousands of on-demand and live classes. But its tech can be tricky to ...

Share on Pinterest The 12-3-30 treadmill challenge is trending on TikTok, but can the viral workout really help you lose weight? M_a_y_a/Getty Images TikTok users claim the 12-3-30 treadmill challenge ...

When a heat wave hits, it's time to move indoors, and doing a treadmill workout can be fun and effective. The 12-3-30 treadmill workout continues to be a favorite among workout trends since it went ...

What is the 12-3-30 treadmill workout? This treadmill workout follows three super simple rules: set the treadmill incline to 12%, then the speed to 3 mph, and walk for 30 minutes. Yep, that's it.