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Research article
Chu huai Wang
Department of Rehabilitation Medicine, the First Affiliated Hospital, Sun Yat-sen University
Corresponding Author
ORCiD: https://orcid.org/0000-0002-8071-9298
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Background: Pressure biofeedback unit (PBU) is a non-invasive, low-cost, and widely used device for monitoring, evaluating and training transverse abdominals (TA) and multifidus (MF) muscles of patients with low back pain (LBP). There has been little research on quantifying muscle activity under different pressures. The primary aim of this preliminary study was to explore the response between deep local trunk muscles (TA and MF) and different target pressures of PBU in seated positions.
Methods: Twenty-two patients with chronic LBP (cLBP) and 24 age matched healthy individuals were recruited. Electromyography (EMG) signals were recorded from the TA and MF muscles while individuals contract the TA and MF muscles in seated position to achieve PBU pressure value of 50, 60 and 70mmHg in random order. The t-test was used to compare between-group and within-subjects’ effects to examine the effect of different pressure values. Spearman’s correlation analysis was performed in the cLBP group to determine potential correlations.
Results: The %MVIC of the TA and MF in the cLBP group were statistically higher than the control group at each pressure value (P＜0.05). The slope of the cLBP subjects was significantly steeper than the healthy control subjects (TA: P=0.01, MF: P＜0.001). During maximal voluntary isometric contraction (MVIC) of TA and MF, compared with pain-free group, cLBP patients showed a significant decrease (P≤0.001). MF MVIC was significantly and moderately negatively correlated with visual analog scale (VAS) (r = -0.48, P=0.024) and Oswestry Disability Index (ODI) (r = -0.59, P=0.004).
Conclusions: The study demonstrates the feasibility of using PBU to assess muscle contraction that corresponds with changes of muscle activity as measured by EMG. The use of EMG to quantify the extent of how much the PBU activates muscles may provide important information to clinicians and researchers for patients with LBP.
Keywords
low back pain, multifidus, pressure biofeedback unit, transverse abdominals
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View the published article at BMC Musculoskeletal Disorders.
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Editorial decision: Major revision
On 22 Apr, 2020
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Reviewer #2 agreed
On 18 Mar, 2020
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Received 18 Mar, 2020
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Invitations sent on 17 Mar, 2020
Reviewer #1 agreed
On 17 Mar, 2020
Editor assigned
On 10 Mar, 2020
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On 09 Mar, 2020
Editor invited
On 09 Mar, 2020
Version 1
Posted 03 Jan, 2020
No comments provided
Editorial decision: Major revision
On 10 Feb, 2020
Review #3 received
Received 06 Feb, 2020
Review #1 received
Received 06 Feb, 2020
Reviewer #8 agreed
On 04 Feb, 2020
Review #6 received
Received 03 Feb, 2020
Reviewer #7 agreed
On 01 Feb, 2020
Review #2 received
Received 01 Feb, 2020
Reviewer #6 agreed
On 30 Jan, 2020
Reviewer #5 agreed
On 29 Jan, 2020
Reviewer #4 agreed
On 28 Jan, 2020
Reviewer #2 agreed
On 27 Jan, 2020
Reviewer #3 agreed
On 27 Jan, 2020
Reviewer #1 agreed
On 13 Jan, 2020
Reviewers invited
Invitations sent on 06 Jan, 2020
Editor assigned
On 12 Dec, 2019
Submission checks complete
On 11 Dec, 2019
Editor invited
On 11 Dec, 2019
First submitted
On 10 Dec, 2019
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See the published version of this preprint at BMC Musculoskeletal Disorders.
This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research article
Chu huai Wang
Department of Rehabilitation Medicine, the First Affiliated Hospital, Sun Yat-sen University
Corresponding Author
ORCiD: https://orcid.org/0000-0002-8071-9298
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
View the published article at BMC Musculoskeletal Disorders.
No community comments so far
Editorial decision: Major revision
On 22 Apr, 2020
Review #2 received
Received 02 Apr, 2020
Reviewer #2 agreed
On 18 Mar, 2020
Review #1 received
Received 18 Mar, 2020
Reviewers invited
Invitations sent on 17 Mar, 2020
Reviewer #1 agreed
On 17 Mar, 2020
Editor assigned
On 10 Mar, 2020
Submission checks complete
On 09 Mar, 2020
Editor invited
On 09 Mar, 2020
Version 1
Posted 03 Jan, 2020
No comments provided
Editorial decision: Major revision
On 10 Feb, 2020
Review #3 received
Received 06 Feb, 2020
Review #1 received
Received 06 Feb, 2020
Reviewer #8 agreed
On 04 Feb, 2020
Review #6 received
Received 03 Feb, 2020
Reviewer #7 agreed
On 01 Feb, 2020
Review #2 received
Received 01 Feb, 2020
Reviewer #6 agreed
On 30 Jan, 2020
Reviewer #5 agreed
On 29 Jan, 2020
Reviewer #4 agreed
On 28 Jan, 2020
Reviewer #2 agreed
On 27 Jan, 2020
Reviewer #3 agreed
On 27 Jan, 2020
Reviewer #1 agreed
On 13 Jan, 2020
Reviewers invited
Invitations sent on 06 Jan, 2020
Editor assigned
On 12 Dec, 2019
Submission checks complete
On 11 Dec, 2019
Editor invited
On 11 Dec, 2019
First submitted
On 10 Dec, 2019
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Orthopedics
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published article at BMC Musculoskeletal Disorders.
Background: Pressure biofeedback unit (PBU) is a non-invasive, low-cost, and widely used device for monitoring, evaluating and training transverse abdominals (TA) and multifidus (MF) muscles of patients with low back pain (LBP). There has been little research on quantifying muscle activity under different pressures. The primary aim of this preliminary study was to explore the response between deep local trunk muscles (TA and MF) and different target pressures of PBU in seated positions.
Methods: Twenty-two patients with chronic LBP (cLBP) and 24 age matched healthy individuals were recruited. Electromyography (EMG) signals were recorded from the TA and MF muscles while individuals contract the TA and MF muscles in seated position to achieve PBU pressure value of 50, 60 and 70mmHg in random order. The t-test was used to compare between-group and within-subjects’ effects to examine the effect of different pressure values. Spearman’s correlation analysis was performed in the cLBP group to determine potential correlations.
Results: The %MVIC of the TA and MF in the cLBP group were statistically higher than the control group at each pressure value (P＜0.05). The slope of the cLBP subjects was significantly steeper than the healthy control subjects (TA: P=0.01, MF: P＜0.001). During maximal voluntary isometric contraction (MVIC) of TA and MF, compared with pain-free group, cLBP patients showed a significant decrease (P≤0.001). MF MVIC was significantly and moderately negatively correlated with visual analog scale (VAS) (r = -0.48, P=0.024) and Oswestry Disability Index (ODI) (r = -0.59, P=0.004).
Conclusions: The study demonstrates the feasibility of using PBU to assess muscle contraction that corresponds with changes of muscle activity as measured by EMG. The use of EMG to quantify the extent of how much the PBU activates muscles may provide important information to clinicians and researchers for patients with LBP.
Figure 1
Figure 2
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