Do this routine 2-3 times depending on your level of fitness

90-120 seconds of rest between workouts

 

NO REST BETWEEN SETS

 

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30 Crunches 

10 Leg Raises

10 Sit Ups

16 Knee-Elbow Crunches

30 second Plank

5 Back Extentions

15 second Side-Plank (each side)