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"it strengthens your core." http://www.youtube.com/watch?v=9TS3xP-tOWM http://www.youtube.com/watch?v=9TS3xP-tOWM
by JMiao 18y ago
"it strengthens your core."
http://www.youtube.com/watch?v=9TS3xP-tOWM http://www.youtube.com/watch?v=9TS3xP-tOWM