People can burn comparable amounts of calories in HIIT routines lasting, compared to longer continuous exercise routines. But  this doesn't mean that calorie burn translates into weight loss. 

This is the problem with HIIT, just like with any other form of exercise: it’s much easier to lose weight by cutting calories in your diet than trying to burn excess calories.

...has to do with heart health: Intervals can boost cardio-respiratory health with a smaller time investment compared to continuous forms of exercise. 

It's not about superior fat-burning capacity or bigger muscles, but about improved VO2 max, a measure of endurance that calculates t...