People swear by 12-3-30 as an effective way to lose weight and get into the best shape ever.

To test out the hype, I tried the12-3-30 workoutfor an entire week and have a lot to say.

12-3-30 is not for the faint of heart.

woman incline walking workout, concept of viral 12-3-30 treadmill workout

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Walking and light jogging are my main forms of cardio.

Needless to say, I was not at all intimidated to try this workout.

On day two, I actually wanted to cry.

12-3-30 viral treadmill workout review, split image

Alexa Mellardo

On day three, I was extremely tempted to cheat and lower the incline down to nine.

(However, I did not.)

But alas, I stuck with 12-3-30 for the full week.

It was certainly a challengeliterally an uphill battle for 30 straight minutes, five days in a row.

As a moderate-to-intense walker, I wouldn’t recommend this routine to beginner walkers.

As for the speed setting, three is quite doable for me.

It’s probably a pace I would keep when walking uphill for this length of workout.

The challenge for me was the consistent, intense incline.

CARDIO ROUTINE FOR FAT LOSS!

There’s usually a lot more going on behind the scenes.

A lot of the videos don’t show that aspect of it.

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But I also felt incredibly accomplished after the week was done.

Heyno pain, no gain, right?

It was clear I got an effective workout every day I hit the treadmill.

I discovered that I favor a routine like this that kills two birds with one stone.

As Gatlin previously stated, it provides a cardio and resistance workout all in one.