Trunk exercises performed on an unstable surface improve trunk muscle activation, postural control, and gait speed in patients with stroke

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  • Jung Kyoung-Sim
    Institute for Life Sciences, Asan Medical Center, College of Medicine, University of Ulsan, Republic of Korea
  • Cho Hwi-Young
    Department of Physical Therapy, College of Health Science, Gachon University: 191 Hambangmoe-ro, Yeonsu-gu, Incheon 406-799, Republic of Korea
  • In Tae-Sung
    Department of Physical Therapy, Shin-Hwa Rehabilitation Hospital, Republic of Korea

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[Purpose] This study examined the effects of trunk exercises performed on an unstable surface on trunk muscle activation, postural control, and gait speed in stroke patients. [Subjects] Twenty-four participants with stroke were recruited in this study and randomly distributed into experimental (n = 12) and control groups (n = 12). [Methods] Subjects in the experimental group participated in trunk exercises on the balance pad for 30 min, five times a week for 4 weeks; those in the control group performed trunk exercises on a stable surface for 30 min, five times a week for 4 weeks. Trunk muscle activation was measured by using surface electromyography, and trunk control was evaluated with the Trunk Impairment Scale (TIS). Gait speed was measured with the 10-Meter Walk Test. [Results] Activity of the external and internal oblique muscles in the experimental group was significantly higher than that in the control group. The TIS score of the experimental group showed significantly greater improvement than did that of the control group. The 10-Meter Walk Test (10MWT) score also significantly improved in the experimental group. [Conclusion] Trunk exercises on an unstable surface improve trunk muscle activation, postural control, and gait speed in patients with hemiparetic stroke.

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