FitnessIs the ’12-3-30′ Treadmill Routine a Good Workout?Kane DaneJune 13, 2023June 13, 2023 by Kane DaneJune 13, 2023June 13, 2023 Searching for something new to add to your workout routine? Check out the ’12-3-30′ treadmill routine! It’s a high-intensity interval training workout. You can burn...