![I DID LAUREN GIRALDO'S 30 DAY TREADMILL CHALLENGE (shocking results) | Treadmill routine, Workout challenge, Challenges I DID LAUREN GIRALDO'S 30 DAY TREADMILL CHALLENGE (shocking results) | Treadmill routine, Workout challenge, Challenges](https://i.pinimg.com/736x/b0/ae/be/b0aebe2c2dec0f7f4342d658f85feb37.jpg)
I DID LAUREN GIRALDO'S 30 DAY TREADMILL CHALLENGE (shocking results) | Treadmill routine, Workout challenge, Challenges
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
![TikTok is talking about influencer Lauren Giraldo's "12-3-30" treadmill workout, which involves… | Treadmill routine, Treadmill workout, 30 minute treadmill workout TikTok is talking about influencer Lauren Giraldo's "12-3-30" treadmill workout, which involves… | Treadmill routine, Treadmill workout, 30 minute treadmill workout](https://i.pinimg.com/originals/46/bd/d9/46bdd9edf235911f943d086e55fdbf47.png)
TikTok is talking about influencer Lauren Giraldo's "12-3-30" treadmill workout, which involves… | Treadmill routine, Treadmill workout, 30 minute treadmill workout
![Personal trainer reveals whether low-impact '12-3-30' workout is really beneficial | Daily Mail Online Personal trainer reveals whether low-impact '12-3-30' workout is really beneficial | Daily Mail Online](https://i.dailymail.co.uk/1s/2022/02/21/19/54472451-0-image-a-42_1645472706114.jpg)