do these

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=-VavhODZ4qY

if you have a weak back, like most of the cornballs on here, dont do these! but if you can manage the arch, and then rep it from thier? then do it!if yer not...

abs, stomach, crunches, darness1234, sexy, obliqes, fitness, workout, muscle, body, exercise, health, training
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