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Reverse sit-ups, I also do not how a?

Gallant magnificent2010-04-12 09:13:24 +0000 #1

wooden warehouse show application2010-04-12 09:20:27 +0000 #2
back strength is not enough.
1988Michael2010-04-12 09:31:24 +0000 #3
back too hard
DannyV2010-04-12 09:22:09 +0000 #4
You can first try to lie on the bed Shuangshoubaotou, forced up the upper body, to do every day to increase the strength of the back waist.

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