JOURNAL BROWSE
Search
Advanced SearchSearch Tips
The Effects of Varying Degrees of Backrest on Abdominal Muscles and Back Extensor Activation During Lower Extremity Exercise
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
  • Journal title : Physical Therapy Korea
  • Volume 11, Issue 1,  2004, pp.19-25
  • Publisher : Korean Research Society of Physical Therapy
  • DOI :
 Title & Authors
The Effects of Varying Degrees of Backrest on Abdominal Muscles and Back Extensor Activation During Lower Extremity Exercise
Cynn, Won-Suk; Lee, Young-Rok; Chang, Young-Jin; Choi, In-Yong;
  PDF(new window)
 Abstract
The purpose of this study was to investigate the effects of backrests of varying degrees (, , ) on three abdominal muscles (upper rectus abdominis, external oblique, internal oblique) and back extensor activation during lower extremity exercise. The three different conditions during bilateral knee extention exercise were: (1) leaning on a chair with a backrest, (2) leaning on a chair with a backrest, (3) leaning on a chair with a backrest. Fifteen healthy muscle subjects (mean age=24.2 years [SD=2.96], mean height=175.6 cm [SD=7.46], mean weight=69.1 kg [SD=7.36]) with no history of neuromusculoskeletal disease voluntarily participated in this study. Electromyography was used to collect muscle activation, and the muscle activation was expressed as a percentage of maximal voluntary isometric contraction (%MVIC). Repeated one-way analysis of variance (ANOVA) was used to determine the statistical significance. The results were as follows: (1) upper rectus abdominis, external oblique, internal oblique activation measured significantly lower. (2) measured significantly lower when lower degree.
 Keywords
Backrest;EMG;Knee extension;Muscle activation;
 Language
Korean
 Cited by