|
KMID : 0608320090160040016
|
|
Physical Therapy Korea
2009 Volume.16 No. 4 p.16 ~ p.22
|
|
|
EMG Activities of Trunk and Lower Extremity Muscles Induced by Different Intensity of Whole Body Vibration During Bridging Exercise
|
|
Kim Tack-Hoon
Choi Houng-Sik
|
|
|
Abstract
|
|
|
|
The purpose of this study was to investigate the trunk and lower extremity muscle activity induced by three different intensity conditions (intensity 1, 3, 5) of whole body vibration (WBV) during bridging exercise. Surface electromyography (EMG) was used to measure trunk and lower extremity muscles activity. Eleven healthy young subjects (6 males, 5 females) were recruited from university students. The collected EMG data were normalized using reference contraction (no vibration during bridging) and expressed as a percentage of reference voluntary contraction. To analyze the differences in EMG data, the repeated one-way analysis of variance was used. A Bonferroni’s correction was used for multiple comparisons. The study showed that EMG activity of the rectus abdominis, external oblique, internal oblique, erector spinae and rectus femoris muscles was not significantly different among three intensity conditions of WBV during bridging exercise (p>.05). However, there were significantly increased EMG activity of the medial hamstring muscle (p=.001) and medial gastrocnemius muscle (p=.027) in the intensity 3 condition compared with the intensity 1 condition This result can be interpreted that vibration was absorbed through the distal muscles, plantar flexor and knee flexor.
|
|
|
KEYWORD
|
|
|
Bridging exercise, Electromyography, Vibration intensity, Whole body vibration
|
|
|
FullTexts / Linksout information
|
|
|
|
|
Listed journal information
|
|
|