Learn what fitness experts say you should know about this trendy treadmill incline workout before you try it.

She credits the simple incline walking routine with helping her feel more comfortable at the gym.

Don’t mistake simplicity for ease, though this workout still packs a punch.

Giraldo came up with the formula by happenstance, she toldTODAY.

That’s how the combination started."

But it took a while for Giraldo to do the workout at full capacity, she continued.

“I definitely had to work up to the 30 minutes,” she said.

“And I look forward to it.

It’s my me time.”

The simplicity of Giraldo’s 12-3-30 workout sounds enticing, but is it right for you?

All you need is areliable treadmillthat goes up to 12.

“Walking on an incline can be very taxing on your body,” explains Burgau.

“And doing it on a level-12 incline for 30 minutes straight is a lot.

This is especially important for people who are new to fitness, says Burgau.

This gradual progression could take you anywhere from several weeks to a few months, he adds.

“It’s going to be different for everyone.”

As with most workouts, form is key during the 12-3-30 workout.

When walking uphill, you’re naturally in a forward flection, explains Burgau.

“It shortens your chest and pec muscles and lengthens your upper back andscapular muscles,” he says.

Meaning, your posture is probably going to be jeopardized after a while.

“If at any point you feel your lower back straining, stop.”

“Variety is so important.”

That’s why it’s important to switch things up, he adds.

“double-check you’re holding the stretches for at least 30 to 60 seconds each,” he adds.

“It’s just unnecessary when there are so many otherlower-impact workoutsthat are equally effective.”

“I’m a huge proponent of doing whatever it is that motivates you,” adds Burgau.

“Doing anything is better than sitting on the couch.

But it’s important to be informed and confirm you’re being safe.