Peer Review History

Original SubmissionSeptember 18, 2024
Decision Letter - Holakoo Mohsenifar, Editor

PONE-D-24-37905Studies on the hysteresis of trunk muscles - muscular specificities must be taken into accountPLOS ONE

Dear Dr. Anders,

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Holakoo Mohsenifar

Academic Editor

PLOS ONE

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Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: Yes

Reviewer #2: Yes

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2. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: I Don't Know

Reviewer #2: Yes

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3. Have the authors made all data underlying the findings in their manuscript fully available?

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Reviewer #1: Yes

Reviewer #2: Yes

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4. Is the manuscript presented in an intelligible fashion and written in standard English?

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Reviewer #1: Yes

Reviewer #2: Yes

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5. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: Dear Editor

Thank you for the opportunity to review this manuscript. There are some specific comments:

Introduction

- Please give a reason for the particular research design in the introduction.

Methods

- The steps to derive the final sample from the initial population have not been described.

- Inclusion and exclusion criteria are not clear. Were people with hip region surgery, lumbar and/ or hip arthritis or joint inflammation, opioid analgesia, or corticosteroid intervention for pain included?

- How is the sample size determined?

- What organization or institution was the data (used in this study) for?

- Provide some references for "Investigation Procedure"

- Mention the company and country of the manufacturer of EMG

- It is mentioned in the text that "The electrode placement followed international recommendations (13, 14)."However, the cited references did not explain the location of the electrodes for the iliocostalis, multifidus, and longissimus muscles. These are deep muscles and fine-wire EMG is needed.

Discussion

- Discuss the limitations of the study, taking into account sources of potential bias or imprecision.

- Lines 338-340: "Specifically, our study provided experimental evidence supporting the proposed functional properties of the MF as a global stabilizing muscle". In this sentence, the results are generally generalized. The results of this study cannot be generalized to populations such as patients with low back pain. Rewrite the sentence according to the target population. However, in my opinion, considering that the power calculation was not done and the sample size was low, the results cannot be generalized at all.

Reviewer #2: The manuscript aimed to investigate how the activation of trunk muscles is altered under isometric conditions with continuously changing load demands.The present study demonstrated that hysteresis behavior was detectable in all examined trunk muscles. I think that this result will make important contributions to the literature.

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Reviewer #1: Yes: Shabnam ShahAli

Reviewer #2: No

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Revision 1

Reviewer #1: Dear Editor

Thank you for the opportunity to review this manuscript. There are some specific comments:

Introduction

- Please give a reason for the particular research design in the introduction.

Answer

We have now added a respective passage in the introduction. (L50-54)

Methods

- The steps to derive the final sample from the initial population have not been described.

Answer

All initially acquired subjects were investigated and their data went into the analysis. Maybe you mean, how the sample was acquired. As this is missing in the manuscript we have now added this particular information (L62-64)

- Inclusion and exclusion criteria are not clear. Were people with hip region surgery, lumbar and/ or hip arthritis or joint inflammation, opioid analgesia, or corticosteroid intervention for pain included?

Answer

No – we excluded any surgery in the trunk or hip region and also asked for any pain medication, which was denied by all participants. This has now been added to the respective section (L69-71)

- How is the sample size determined?

Answer

We assumed an effect size of 0.5, two sided tests, and a power of 0.8. By testing matched pairs the required sample size would have been 34 subjects. For safety reasons (taking into account technical and subject related problems) we finally investigated 40 participants. This has now been added to the respective section (L136-138)

- What organization or institution was the data (used in this study) for?

Answer

The study was no research for hire. Consequently, all collected data are the property of our institution and, ultimately, of the University Hospital Jena. At this point we are uncertain, if this particular information should be added to the manuscript.

- Provide some references for "Investigation Procedure"

Answer

There is no specific reference for the methodology applied in this particular investigation, as these are previously unpublished data. However, extensive research has already been conducted using this device. We have now included some references. (L83-84)

- Mention the company and country of the manufacturer of EMG

Answer

We have already mentioned the manufacturer of the SEMG device. (L115). We have now also added the country for all manufacturers.

- It is mentioned in the text that "The electrode placement followed international recommendations (13, 14)."However, the cited references did not explain the location of the electrodes for the iliocostalis, multifidus, and longissimus muscles. These are deep muscles and fine-wire EMG is needed.

Answer

We have now added the missing reference.

Discussion

- Discuss the limitations of the study, taking into account sources of potential bias or imprecision.

Answer

We have now added a Limitations section (L…)

- Lines 338-340: "Specifically, our study provided experimental evidence supporting the proposed functional properties of the MF as a global stabilizing muscle". In this sentence, the results are generally generalized. The results of this study cannot be generalized to populations such as patients with low back pain. Rewrite the sentence according to the target population. However, in my opinion, considering that the power calculation was not done and the sample size was low, the results cannot be generalized at all.

Answer

As we have now added a limitations section this particular issue is mentioned there exemplarily.

Reviewer #2: The manuscript aimed to investigate how the activation of trunk muscles is altered under isometric conditions with continuously changing load demands. The present study demonstrated that hysteresis behavior was detectable in all examined trunk muscles. I think that this result will make important contributions to the literature.

Thank you for this positive evaluation of our work.

Decision Letter - Holakoo Mohsenifar, Editor

Studies on the hysteresis of trunk muscles - muscular specificities must be taken into account

PONE-D-24-37905R1

Dear Dr. Christoph Anders,

We’re pleased to inform you that your manuscript has been judged scientifically suitable for publication and will be formally accepted for publication once it meets all outstanding technical requirements.

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Kind regards,

Holakoo Mohsenifar

Academic Editor

PLOS ONE

Additional Editor Comments (optional):

Reviewers' comments:

Formally Accepted
Acceptance Letter - Holakoo Mohsenifar, Editor

PONE-D-24-37905R1

PLOS ONE

Dear Dr. Anders,

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on behalf of

Dr. Holakoo Mohsenifar

Academic Editor

PLOS ONE

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