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60 sec
2 min
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DAREBEE Workout: What it Works
The abdominals are comprised of four separate muscle groups: the external abs (better known as the six-pack), the external and internal obliques and the core. Crunch Time is an abdominal training workout that targets all those muscle groups for an athletic performance-enhancing ab strengthening result. 
Extra Credit: 1 minute rest between sets. 
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