What Exactly is the 12-3-30 Treadmill Workout? Explained
You may have heard about a workout called the 12-3-30. It’s simple: you walk on a treadmill with a 12% incline, go at 3 miles per hour, and keep it up for 30 minutes. This exercise has become very popular, especially because people shared how well it worked for them on TikTok. For example, one … Read more