The “12-3-30” workout, a popular TikTok-viral treadmill routine set at 12% incline, 3mph speed for 30 minutes, has been further innovated by actor Hilary Duff. Finding the workout too easy, Duff added a twist, wearing a 12-pound weighted vest to increase the intensity and cardio output. Various modifications can be made to the 12-3-30 workout such as adjusting the incline or speed, or adding wrist/ankle weights.
Hilary Duff’s “12-3-30” Workout Hack Is Pretty Genius
The “12-3-30” workout, a popular TikTok-viral treadmill routine set at 12% incline, 3mph speed for 30 minutes, has been further innovated by actor Hilary Duff. Finding the workout too easy, Duff added a twist, wearing a 12-pound weighted vest to increase the intensity and cardio output. Various modifications can be made to the 12-3-30 workout such as adjusting the incline or speed, or adding wrist/ankle weights.