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What to know about the TikTok-famous '12-3-30' treadmill workout

ABC News
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The " 12 -3-30" workout involves walking on a treadmill for 30 minutes at a 3 mph pace and on a 12% incline.

Social media influencer Lauren Giraldo first shared the low-impact cardio workout on YouTube in 2019 .

She credited it with helping her lose 30 pounds in a video that received more than 2 million likes on TikTok .

If you do not have access to a treadmill, the simplest way to mimic the workout outdoors is to walk for 30 minutes on a hilly route.

Alternatively, bicycling, tennis, swimming and walking or running outdoors will give you a steady cardio workout, according to Schaefer .