title: Comparison of EMG activity on abdominal muscles during plank exercise with unilateral and bilateral additional isometric hip adduction.
abstract: The aim of this study was to investigate the effects of additional isometric hip adduction during the plank exercise on the abdominal muscles. Twenty healthy young men participated in this study. Surface electromyography (EMG) was used to monitor the activity of the bilateral rectus abdominis (RA), the internal oblique (IO), and the external oblique (EO) muscles. The participants performed three types of plank exercise; the standard plank exercise, the plank exercise with bilateral isometric hip adduction, and the plank exercise with unilateral isometric hip adduction. All abdominal muscle activity was significantly increased during the plank exercise combined with the bilateral and unilateral isometric hip adduction compared with the standard plank exercise (p<0.05). Bilateral IO, EO, and left RA muscle activity was significantly increased during the unilateral isometric hip adduction compared with the bilateral isometric hip adduction (p<0.05). These findings suggest that additional isometric hip adduction during the plank exercise could be a useful method to enhance abdominal muscle activity. In particular, the unilateral isometric hip adduction is a more beneficial exercise than the bilateral isometric hip adduction.
authors.affiliation: Department of Rehabilitation Science, Graduate School, Inje University, Gimhae, South Korea. Electronic address: gasigogi11@naver.com.
authors.forename: Soo-Yong
authors.initials: SY
authors.lastname: Kim
authors.affiliation: Department of Physical Therapy, Graduate School, Inje University, Gimhae, South Korea. Electronic address: kmhyuk01@naver.com.
authors.forename: Min-Hyeok
authors.initials: MH
authors.lastname: Kang
authors.affiliation: Busan Sling Exercise Center, Busan, South Korea. Electronic address: sling01@hanmail.net.
authors.forename: Eui-Ryong
authors.initials: ER
authors.lastname: Kim
authors.affiliation: Department of Rehabilitation Medicine, Pusan National University Yangsan Hospital, Yangsan, South Korea. Electronic address: wjddlsrnl111@naver.com.
authors.forename: In-Gui
authors.initials: IG
authors.lastname: Jung
authors.affiliation: Department of Physical Therapy, The Graduate School of Public Health, Inje University, Gimhae, South Korea. Electronic address: kika9468@naver.com.
authors.forename: Eun-Young
authors.initials: EY
authors.lastname: Seo
authors.affiliation: Department of Physical Therapy, College of Biomedical Science and Engineering, Inje University, Gimhae, South Korea. Electronic address: ysrehab@inje.ac.kr.
authors.forename: Jae-Seop
authors.initials: JS
authors.lastname: Oh
mesh_terms: D000009:Abdominal Muscles / Q000502:physiology*; D000071596:Abdominal Oblique Muscles / Q000502:physiology; D000328:Adult; D064131:Back Muscles / Q000502:physiology; D018592:Cross-Over Studies; D004576:Electromyography / Q000379:methods*; D015444:Exercise / Q000502:physiology*; D006615:Hip / Q000502:physiology*; D006801:Humans; D007537:Isometric Contraction / Q000502:physiology*; D008297:Male; D017568:Rectus Abdominis / Q000502:physiology; D055070:Resistance Training / Q000379:methods*
keywords: Electromyography; Hip adduction; Plank exercise; Trunk stability