It has been shown in studies that doing 3 10min high intensity cardio sessions with a 20minute break inbetween burnt more fat than doing 1 30minute session.
If you think about it, it makes a lot of sense, I wonder if this principle is what HIIT is based on. You could very easily say this is HIIT but the usual HIIT routine is just 1 cardio session.
So I wonder if this works better than just one session of HIIT.
Cardio break-up | Muscle & Fitness | Find Articles at BNET
Effect of split exercise sessions on excess post-exercise oxygen consumption.So they had male and female subjects perform either a 30-minute treadmill run at 80% of their max heart rate or three 10-minute bouts of running at the same intensity, separated by 20-minute rest periods. They discovered no difference between the total calories burned or the amount of fat burned, but the intermittent bouts felt much easier than the continuous run. What's more, they found that the short bouts significantly lowered the amount of fat that showed up in the subjects' blood after eating the high-fat meal. This means that short, multiple bouts of cardio may help you store less dietary fat
Conflicting information about amount of calories burnt but regardless it seems, ideally you would seperate cardio sessions by 30min breaks if you could.VO2 returned to baseline within 30 minutes for all three exercise trials. Magnitude of EPOC was also similar after all runs. However, the combined magnitude (expressed in kcals) of the two 25 minute runs was significantly greater than the continuous 50 minute run (13.88 vs 6.39). Heart rate remained elevated above baseline, and respiratory exchange ratio was lower than baseline 30 minutes after exercise. It is concluded that split exercise sessions can significantly increase post-exercise caloric expenditure. However, the overall magnitude of the increase is small.