You do each circuit twice with 20 seconds of work and 10 seconds of rest for eac…


You do each circuit twice with 20 seconds of work and 10 seconds of rest for each move. It's intense and there's little rest, but it's over in just 12 minutes — 15 if you take a one minute break between each circuit.



Source by sfuxia

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Did you know a 20-minute HIIT workout burns more fat than 50 minutes on a treadm…