BOSU Balance Trainer Lower Back Crunches

BOSU Balance Trainer Lower Back Crunches
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The BOSU Balance Trainer is good for a variety of functional workouts for the entire body.

http://AskTheTrainer.com/bosu-ball-exercises.html

If you don't know whether you should be doing lower back exercises you should check out the following article:

http://AskTheTrainer.com/best-lower-back-exercises.html