Killer 4 Minute Abs Workout at Home

Last time, I brought you a great workout from Craig Ballantyne of Turbulence Training. Here’s another great workout you do at home to train your abs: The Benefit of doing  Intervals with Abs: In this workout, Craig Ballantyne does 3 rounds of 4 exercises. Each exercises is done for a 60 secon interval. Intervals Burn Fat Doing hundreds of crunches

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