The Comparisons of Different Abdominal Drawing-in Maneuver During Plank Exercises on Trunk Stability

Abstract

To measure the thickness of transversus abdominis(TrA), internal oblique(IO), external oblique(EO) and
multifidus(MF) and compare the effects on trunk stability according to the performing abdominal drawingin
manuever during plank exercises. Thirty healthy male and female adults were recruited. Subjects perform
the plank exercises after measuring thickness of TrA, IO, EO and MF in resting position. When performing
the General plank(GP), General plank with abdominal drawing-in maneuver(GPA), Unstable surface of
plank(USP) and Unstable surface of the plank with abdominal drawing-in maneuver(USPA), we measured
three times and used the value of measurements. All measurements were used in One way repeated ANOVA.
The results of study, resting time and each plank exercises showed significant differences in TrA, IO, MF
muscles. In the comparison between each plank exercises, the TrA, IO, MF activation increased because that
muscle were thicker than other plank exercises when performing GPA and USPA. These findings suggest
that a plank exercise with abdominal drawing-in maneuver is useful way in trunk stability.