title: Serratus anterior muscle activation during knee push-up plus exercise performed on static stable, static unstable, and oscillating unstable surfaces in healthy subjects.
abstract: OBJECTIVE
  To compare electromyographic (EMG) activity of the serratus anterior (SA) during knee push-up plus exercises according to various surfaces (static stable, static unstable, and oscillating unstable surfaces).
  
  
  METHODS
  Comparative study by repeated measures.
  
  
  METHODS
  Yonsei University laboratory.
  
  
  METHODS
  In total, 15 healthy male subjects participated.
  
  
  METHODS
  The subjects performed knee push-up plus exercises on three different surfaces: static stable, static unstable, and oscillating unstable surfaces. Surface EMG activity of the SA for the peak and average amplitudes were collected from the dominant arm and presented as a percentage of the maximal voluntary contraction. A one-way repeated-measures ANOVA with a Bonferroni post hoc test was performed to compare differences in SA EMG activity according to the surface.
  
  
  RESULTS
  The peak and average amplitudes of SA activity were significantly greater during knee push-up plus on the oscillating unstable surface than on the static stable or static unstable surfaces (p < 0.01). Additionally, there was no significant difference between the stable and static unstable surfaces (p > 0.05).
  
  
  CONCLUSIONS
  Knee push-up plus exercise on an oscillating unstable surface activates the SA more than the same exercise on static stable and static unstable surfaces.
authors: 234 Maeji-ri, Heungeop-Myeon, Wonju, Kangwon-Do 220-710, Department of Physical Therapy, Graduate School, Yonsei University, Wonju, South Korea. Electronic address: sihyun0411@naver.com.
authors: Si-hyun
authors: SH
authors: Kim
authors: 234 Maeji-ri, Heungeop-Myeon, Wonju, Kangwon-Do 220-710, Laboratory of Kinetic Ergocise Based on Movement Analysis, Department of Physical Therapy, Graduate School, Yonsei University, Wonju, South Korea. Electronic address: kwonoy@yonsei.ac.kr.
authors: Oh-yun
authors: OY
authors: Kwon
authors: 234 Maeji-ri, Heungeop-Myeon, Wonju, Kangwon-Do 220-710, Department of Physical Therapy, Graduate School, Yonsei University, Wonju, South Korea. Electronic address: ssambac1@hotmail.com.
authors: Su-jung
authors: SJ
authors: Kim
authors: 234 Maeji-ri, Heungeop-Myeon, Wonju, Kangwon-Do 220-710, Department of Physical Therapy, Graduate School, Yonsei University, Wonju, South Korea. Electronic address: parkkyue@nate.com.
authors: Kyue-nam
authors: KN
authors: Park
authors: 234 Maeji-ri, Heungeop-Myeon, Wonju, Kangwon-Do 220-710, Department of Physical Therapy, Graduate School, Yonsei University, Wonju, South Korea. Electronic address: dae282282@hanmail.net.
authors: Sung-dae
authors: SD
authors: Choung
authors: Department of Physical Therapy, Joongbu University, Chubu-myeon, Geumsan-gun, Chungcheongnam-do 312-702, South Korea. Electronic address: jhweon@joongbu.ac.kr.
authors: Jong-hyuck
authors: JH
authors: Weon
mesh_terms: D000328:Adult; D004576:Electromyography; D015444:Exercise / Q000502:physiology*; D006801:Humans; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology*; D013499:Surface Properties; D055815:Young Adult
keywords: Knee push-up plus; Serratus anterior; Unstable surface