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Effect of Inflatable Standing Surface With Different Levels of Air Pressure on Leg Muscle Activity

공기압 차이에 따른 불안정지지면이 다리 근활성도에 미치는 영향

  • 박치복 (남부대학교 물리치료학과) ;
  • 김용남 (남부대학교 물리치료학과) ;
  • 김용성 (남부대학교 물리치료학과) ;
  • 조운수 (남부대학교 물리치료학과) ;
  • 진희경 (서남대학교 대학원 물리치료학과)
  • Received : 2013.01.18
  • Accepted : 2013.03.26
  • Published : 2013.05.21

Abstract

The purpose of this study was to determine the effect of the changes that occur in the leg muscle activity of unstable surface with different levels of air pressures. Three groups of college students have been placed randomly on unstable surfaces with different air pressures at group 1.0 psi ($n_1$=36), group 1.4 psi ($n_2$=40), and group 1.8 psi ($n_3$=40). Using surface electromyography, the recruitment of the tibialis anterior, peroneus longus, and the gastrocnemius was measured. Maximal voluntary isometric contraction was measured at the different air pressures based on the manual muscle test, then normalizing the value to %maximal voluntary isometric contraction (%MVIC). The tibialis anterior muscle activity was significant change from the unstable surface with difference levels of air pressures between group 1.0 psi and 1.8 psi and between group 1.4 psi and 1.8 psi. peroneus longus muscle activity was significant changes in muscle activity occurred between 1.0 psi and 1.4 psi group and between 1.0 psi and 1.8 psi group. Gastrocnemius muscle activity was significant change in muscle activity occurred between 1.0 psi and 1.4 psi group and between 1.0 psi and 1.8 psi group. In conclusion it identify that 1.0 psi group is most effective on muscle activity than the other groups. These suggest that the rehabilitation or strengthening of patients with ankle injuries, balance exercise with low air pressure like 1.0 psi can be more effective.

Keywords

References

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