The 12-3-30 workout, which involves incline walking, has been gaining attention for its potential to burn fat. Some reports suggest it may be more effective than running, with one study confirming it burns 7% more fat, although experts have varying opinions on its effectiveness and safety. The workout's benefits and drawbacks are being debated, with some outlets offering alternative versions, such as the 12-3-15 walking workout, for those looking for modifications.