For the uninitiated, TikTok is a digital treasure trove full of tips, tricks and I-tried-its galore. The most recent trend to take over our feeds is the viral treadmill routine known as the 12-3-30 workout. The popular cardio sweat sesh involves setting your treadmill incline to 12 percent and then walking at 3 mph for 30 minutes straight. (12-3-30, get it?) On TikTok alone, the hashtag #12330 has garnered more than 182 million views and counting. Back in the real world, you’ve probably seen one or two gym-goers making the climb to nowhere as well. But when you get past the hype, can this simple—albeit catchy—formula really help us build strength, lose weight and increase our overall fitness? We reached out to Anna Victoria, Fit Body App founder and certified personal trainer, for her honest thoughts and expert advice.