title: Relationship between flexion-rotation test and ultrasound thickness measurement of the abdominal muscles.
abstract: OBJECTIVE
  The purpose of this study was to investigate the relationship between flexion-rotation test and ultrasound (US) thickness measurement of the antero-lateral abdominal muscles.
  
  
  METHODS
  Following ethical approval, a convenience sample of 55 subjects between the ages of 20 and 30 years participated in this study. Endurance of the abdominal muscles was measured using the flexion-rotation test in all subjects. US thickness measurement for the transversus abdominis (TrA), internal oblique (IO) and external oblique (EO) muscles was performed on the right side at rest in a supine position.
  
  
  RESULTS
  Pearson correlation coefficient between the variables of the study showed no significant relationship between the flexion-rotation test and US thickness measurements of the TrA (r = -0.03, P = 0.80), IO (r = -0.13, P = 0.32), and EO (r = -0.14, P = 0.31) muscles. The significance level of 0.05 was chosen.
  
  
  CONCLUSIONS
  It seems that there is no significant relationship between the flexion-rotation test and US measurement of abdominal muscles thickness.
authors.affiliation: Student Research Committee, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Rajabzadeh
authors.affiliation: Student Research Committee, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
authors.forename: Morteza
authors.initials: M
authors.lastname: Taghipour
authors.affiliation: Department of Physical Therapy, School of Rehabilitation Sciences, Iran University of Medical Sciences and Health Services, Tehran, Iran.
authors.forename: Mohammad Reza
authors.initials: MR
authors.lastname: Pourahmadi
authors.affiliation: Department of Physical Therapy, University of Social Welfare and Rehabilitation Sciences, Evin, Tehran, Iran.
authors.forename: Amir Massoud
authors.initials: AM
authors.lastname: Arab
mesh_terms: D000009:Abdominal Muscles / Q000000981:diagnostic imaging* / Q000502:physiology; D000328:Adult; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D012399:Rotation; D012494:Sampling Studies; D014463:Ultrasonography
keywords: Ultrasound; abdominal muscles; clinical test; endurance; thickness