The present invention relates to a device for improving core strength. According to the present invention, the device comprises: a first body part disposed in a direction perpendicular to the ground; a second body part extended from a lower part of the first body part and disposed in a direction perpendicular to the first body part; a sitting part mounted on an upper side of the second body part and allowing a user to sit thereon; and a handle part coupled to one end of a rope connected to the first body part.;COPYRIGHT KIPO 2016
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