You may remember the 12-3-30 workout from a few years ago. In a similar vein, I swapped my after-work walking workout for this session when the ongoing summer heat took a toll on my motivation. How to do the 12-3-30 workoutThe 12-3-30 workout is very simple. "Unlike high-impact exercises, such as running or jumping, the 12-3-30 workout is low-impact. Yes, if you're looking for a daily exercise, the 12-3-30 workout could be a great choice.