If a trainer tells you there's a best way to do interval training, they are wrong. Research shows that intervals are powerful for fat loss, but there's never been a "head-to-head" study comparing different lengths of interval workouts. 20 seconds, 8 seconds, 30 seconds, 60 seconds, they all work. But that's good news. It means that all types of interval training workouts will work to help you burn your belly fat. In addition, for distance runners, intervals of 2-5 minutes are very he
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