This is old news. The important question to be asking is what is the GOAL of the activity.
Improvements in cardiovascular health can be accomplished by small bursts of activity. So 3 10-minute workouts will give you the same heart-strengthening benefits as one 30-minute session. However, three 10-minute segments won't do anything for your cardio-respiratory endurance or endurance training in general.
Tabata and HIIT raining is based on the idea that short bursts of extremely vigorous activity will give the same heart-strengthening benefits as a longer session of moderate activity. The scientific studies seem to bear this out. Again, it does nothing for endurance, and I don't think it's useful for increasing VO2 max, but I haven't investigate it fully, so I could be wrong.
"Fitness" is too general a term to use to describe anything. What a lot of articles address is general cardiovascular health, but don't address weight-loss, endurance, or strength gains.
Edited by: AMANDANCES at: 7/23/2013 (15:05)
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