Muscle activity during the active straight leg raise (ASLR), and the effects of a pelvic belt on the ASLR and on treadmill walking

H. Hu, O.G. Meijer, J.H. van Dieen, P.W. Hodges, S.M. Bruijn, R.L.M. Strijers, P.W.B. Nanayakkara, B.J. van Royen, W.H. Wu, C. Xia

    Research output: Contribution to JournalArticleAcademicpeer-review

    Abstract

    Women with pregnancy-related pelvic girdle pain (PPP), or athletes with groin pain, may have trouble with the active straight leg raise (ASLR), for which a pelvic belt can be beneficial. How the problems emerge, or how the belt works, remains insufficiently understood. We assessed muscle activity during ASLR, and how it changes with a pelvic belt. Healthy nulligravidae (N=17) performed the ASLR, and walked on a treadmill at increasing speeds, without and with a belt. Fine-wire electromyography (EMG) was used to record activity of the mm. psoas, iliacus and transversus abdominis, while other hip and trunk muscles were recorded with surface EMG. In ASLR, all muscles were active. In both tasks, transverse and oblique abdominal muscles were less active with the belt. In ASLR, there was more activity of the contralateral m. biceps femoris, and in treadmill walking of the m. gluteus maximus in conditions with a belt. For our interpretation, we take our starting point in the fact that hip flexors exert a forward rotating torque on the ilium. Apparently, the abdominal wall was active to prevent such forward rotation. If transverse and oblique abdominal muscles press the ilia against the sacrum (Snijders' "force closure"), the pelvis may move as one unit in the sagittal plane, and also contralateral hip extensor activity will stabilize the ipsilateral ilium. The fact that transverse and oblique abdominal muscles were less active in conditions with a pelvic belt suggests that the belt provides such "force closure", thus confirming Snijders' theory. © 2009 Elsevier Ltd. All rights reserved.
    LanguageEnglish
    Pages532-539
    JournalJournal of Biomechanics
    Volume43
    Issue number3
    DOIs
    Publication statusPublished - 2010

    Fingerprint

    Abdominal Muscles
    Exercise equipment
    Walking
    Muscle
    Leg
    Muscles
    Ilium
    Hip
    Electromyography
    Pelvic Girdle Pain
    Sacrum
    Jetties
    Groin
    Torque
    Abdominal Wall
    Pelvis
    Athletes
    Pain
    Pregnancy
    Wire

    Cite this

    Hu, H. ; Meijer, O.G. ; van Dieen, J.H. ; Hodges, P.W. ; Bruijn, S.M. ; Strijers, R.L.M. ; Nanayakkara, P.W.B. ; van Royen, B.J. ; Wu, W.H. ; Xia, C. / Muscle activity during the active straight leg raise (ASLR), and the effects of a pelvic belt on the ASLR and on treadmill walking. In: Journal of Biomechanics. 2010 ; Vol. 43, No. 3. pp. 532-539.
    @article{3ac7faa964bb48aab6d1666c3799629f,
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    abstract = "Women with pregnancy-related pelvic girdle pain (PPP), or athletes with groin pain, may have trouble with the active straight leg raise (ASLR), for which a pelvic belt can be beneficial. How the problems emerge, or how the belt works, remains insufficiently understood. We assessed muscle activity during ASLR, and how it changes with a pelvic belt. Healthy nulligravidae (N=17) performed the ASLR, and walked on a treadmill at increasing speeds, without and with a belt. Fine-wire electromyography (EMG) was used to record activity of the mm. psoas, iliacus and transversus abdominis, while other hip and trunk muscles were recorded with surface EMG. In ASLR, all muscles were active. In both tasks, transverse and oblique abdominal muscles were less active with the belt. In ASLR, there was more activity of the contralateral m. biceps femoris, and in treadmill walking of the m. gluteus maximus in conditions with a belt. For our interpretation, we take our starting point in the fact that hip flexors exert a forward rotating torque on the ilium. Apparently, the abdominal wall was active to prevent such forward rotation. If transverse and oblique abdominal muscles press the ilia against the sacrum (Snijders' {"}force closure{"}), the pelvis may move as one unit in the sagittal plane, and also contralateral hip extensor activity will stabilize the ipsilateral ilium. The fact that transverse and oblique abdominal muscles were less active in conditions with a pelvic belt suggests that the belt provides such {"}force closure{"}, thus confirming Snijders' theory. {\circledC} 2009 Elsevier Ltd. All rights reserved.",
    author = "H. Hu and O.G. Meijer and {van Dieen}, J.H. and P.W. Hodges and S.M. Bruijn and R.L.M. Strijers and P.W.B. Nanayakkara and {van Royen}, B.J. and W.H. Wu and C. Xia",
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    Muscle activity during the active straight leg raise (ASLR), and the effects of a pelvic belt on the ASLR and on treadmill walking. / Hu, H.; Meijer, O.G.; van Dieen, J.H.; Hodges, P.W.; Bruijn, S.M.; Strijers, R.L.M.; Nanayakkara, P.W.B.; van Royen, B.J.; Wu, W.H.; Xia, C.

    In: Journal of Biomechanics, Vol. 43, No. 3, 2010, p. 532-539.

    Research output: Contribution to JournalArticleAcademicpeer-review

    TY - JOUR

    T1 - Muscle activity during the active straight leg raise (ASLR), and the effects of a pelvic belt on the ASLR and on treadmill walking

    AU - Hu, H.

    AU - Meijer, O.G.

    AU - van Dieen, J.H.

    AU - Hodges, P.W.

    AU - Bruijn, S.M.

    AU - Strijers, R.L.M.

    AU - Nanayakkara, P.W.B.

    AU - van Royen, B.J.

    AU - Wu, W.H.

    AU - Xia, C.

    PY - 2010

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    N2 - Women with pregnancy-related pelvic girdle pain (PPP), or athletes with groin pain, may have trouble with the active straight leg raise (ASLR), for which a pelvic belt can be beneficial. How the problems emerge, or how the belt works, remains insufficiently understood. We assessed muscle activity during ASLR, and how it changes with a pelvic belt. Healthy nulligravidae (N=17) performed the ASLR, and walked on a treadmill at increasing speeds, without and with a belt. Fine-wire electromyography (EMG) was used to record activity of the mm. psoas, iliacus and transversus abdominis, while other hip and trunk muscles were recorded with surface EMG. In ASLR, all muscles were active. In both tasks, transverse and oblique abdominal muscles were less active with the belt. In ASLR, there was more activity of the contralateral m. biceps femoris, and in treadmill walking of the m. gluteus maximus in conditions with a belt. For our interpretation, we take our starting point in the fact that hip flexors exert a forward rotating torque on the ilium. Apparently, the abdominal wall was active to prevent such forward rotation. If transverse and oblique abdominal muscles press the ilia against the sacrum (Snijders' "force closure"), the pelvis may move as one unit in the sagittal plane, and also contralateral hip extensor activity will stabilize the ipsilateral ilium. The fact that transverse and oblique abdominal muscles were less active in conditions with a pelvic belt suggests that the belt provides such "force closure", thus confirming Snijders' theory. © 2009 Elsevier Ltd. All rights reserved.

    AB - Women with pregnancy-related pelvic girdle pain (PPP), or athletes with groin pain, may have trouble with the active straight leg raise (ASLR), for which a pelvic belt can be beneficial. How the problems emerge, or how the belt works, remains insufficiently understood. We assessed muscle activity during ASLR, and how it changes with a pelvic belt. Healthy nulligravidae (N=17) performed the ASLR, and walked on a treadmill at increasing speeds, without and with a belt. Fine-wire electromyography (EMG) was used to record activity of the mm. psoas, iliacus and transversus abdominis, while other hip and trunk muscles were recorded with surface EMG. In ASLR, all muscles were active. In both tasks, transverse and oblique abdominal muscles were less active with the belt. In ASLR, there was more activity of the contralateral m. biceps femoris, and in treadmill walking of the m. gluteus maximus in conditions with a belt. For our interpretation, we take our starting point in the fact that hip flexors exert a forward rotating torque on the ilium. Apparently, the abdominal wall was active to prevent such forward rotation. If transverse and oblique abdominal muscles press the ilia against the sacrum (Snijders' "force closure"), the pelvis may move as one unit in the sagittal plane, and also contralateral hip extensor activity will stabilize the ipsilateral ilium. The fact that transverse and oblique abdominal muscles were less active in conditions with a pelvic belt suggests that the belt provides such "force closure", thus confirming Snijders' theory. © 2009 Elsevier Ltd. All rights reserved.

    U2 - 10.1016/j.jbiomech.2009.09.035

    DO - 10.1016/j.jbiomech.2009.09.035

    M3 - Article

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