> What Exercise Is That And What Are its Benefits ?

What Exercise Is That And What Are its Benefits ?

What Exercise Is That And What Are its Benefits ?

Posted at： 2014-09-13　
The exercise is an exercise to build core strength.

here is a video link



http://www.youtube.com/watch?v=ltDtmID6CQQ



watch from 1:08 to 1:1 0



i they are doing crunches with cycling leg movements



can someone tell me what is that exercise and what are its benefits ?
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