EMG activity and force during prone hip extension in individuals with lumbar segmental instability

Hee-Seok Jung; Sun-Young Kang; Joo-Hee Park; Heon-Seock Cynn; Hye-Seon Jeon

doi:10.1016/j.math.2014.11.002

EMG activity and force during prone hip extension in individuals with lumbar segmental instability

Man Ther. 2015 Jun;20(3):440-4. doi: 10.1016/j.math.2014.11.002. Epub 2014 Nov 12.

Authors

Hee-Seok Jung¹, Sun-Young Kang², Joo-Hee Park², Heon-Seock Cynn³, Hye-Seon Jeon⁴

Affiliations

¹ Department of Physical Therapy, Seoul-chuk Hospital, Seoul, Republic of Korea; Department of Physical Therapy, The Graduate School, Yonsei University, 1 Yonseidae-gil, Wonju, Kangwon-do 220-710, Republic of Korea.
² Department of Physical Therapy, The Graduate School, Yonsei University, 1 Yonseidae-gil, Wonju, Kangwon-do 220-710, Republic of Korea.
³ Department of Physical Therapy, College of Health Science, Yonsei University, 1 Yonseidae-gil, Wonju, Kangwon-do, Republic of Korea.
⁴ Department of Physical Therapy, College of Health Science, Yonsei University, 1 Yonseidae-gil, Wonju, Kangwon-do, Republic of Korea. Electronic address: hyeseonj@yonsei.ac.kr.

PMID: 25481028
DOI: 10.1016/j.math.2014.11.002

Abstract

The goal of the current study was to investigate potential differences in back and hip extensor muscle activity and hip extension force during prone hip extension (PHE) in individuals with lumbar segmental instability (LSI) and asymptomatic subjects. Thirty-six subjects with LSI and 26 asymptomatic volunteers participated in this study. Muscle activity of the erector spinae, gluteus maximus, and biceps femoris was recorded using electromyography (EMG), and hip extension force was measured by a digital force gauge. Muscle activity was significantly greater in subjects with LSI than in asymptomatic subjects during PHE (p < 0.05). Hip extension force was significantly lower in the subjects with LSI than in asymptomatic subjects during PHE (p < 0.05). These findings suggest that during PHE, subjects with LSI have differences in back and hip extensor muscle activity and hip extension force compared to asymptomatic individuals.

Keywords: Force; Lumbar segmental instability; Muscle activity; Prone hip extension.

Publication types

Comparative Study
Research Support, Non-U.S. Gov't

MeSH terms

Adult
Case-Control Studies
Cohort Studies
Electromyography / methods*
Female
Hip Joint
Humans
Joint Instability / diagnosis*
Low Back Pain / diagnosis*
Lumbar Vertebrae / physiopathology*
Lumbosacral Region
Muscle Contraction
Prone Position
Range of Motion, Articular / physiology*
Reference Values