Skip to main content
Log in

Corticospinal excitability and reflex modulation in a contralateral non-stretched muscle following unilateral stretching

  • Original Article
  • Published:
European Journal of Applied Physiology Aims and scope Submit manuscript

Abstract

Purpose

Muscle stretching effect on the range of motion (ROM) and force deficit in non-stretched muscle, and the underlying mechanisms, is an ongoing issue. This study aimed to investigate crossover stretching effects and mechanisms on the plantar flexor muscles.

Methods

Fourteen recreationally active females (n = 5) and males (n = 9) performed six sets of 45-s static stretching (SS) (15-s recovery) to the point of discomfort of the dominant leg (DL) plantar flexors or control (345-s rest). Participants were tested for a single 5-s pre- and post-test maximal voluntary isometric contraction (MVIC) with each plantar flexor muscle and were tested for DL and non-DL ROM. They were tested pre- and post-test (immediate, 10-s, 30-s) for the Hoffman (H)-reflex and motor-evoked potentials (MEP) from transcranial magnetic stimulation in the contralateral, non-stretched muscle.

Results

Both the DL and non-DL-MVIC force had large magnitude, significant (↓10.87%, p = 0.027, 2 = 0.4) and non-significant (↓9.53%, p = 0.15, 2 = 0.19) decreases respectively with SS. The SS also significantly improved the DL (6.5%, p < 0.001) and non-DL (5.35%, p = 0.002) ROM. The non-DL MEP/MMax and HMax/MMax ratio did not change significantly.

Conclusion

Prolonged static stretching improved the stretched muscle’s ROM. However, the stretched limb's force was negatively affected following the stretching protocol. The ROM improvement and large magnitude force impairment (statistically non-significant) were transferred to the contralateral muscles. The lack of significant changes in spinal and corticospinal excitability confirms that the afferent excitability of the spinal motoneurons and corticospinal excitability may not play a substantial role in non-local muscle's ROM or force output responses.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6

Similar content being viewed by others

Data availability

All data will be made available on request to the corresponding author.

Code availability

Not applicable.

Abbreviations

DL:

Dominant leg

EMG:

Electromyography

HMax :

Maximal amplitude Hoffman reflex

H-reflex:

Hoffman reflex

MEP:

Motor-evoked potential

MMax :

Maximal amplitude motor action potential wave

M-Wave:

Muscle action potential wave

MVIC:

Maximal voluntary isometric contraction

Non-DL:

Non-dominant leg

ROM:

Range of motion

SS:

Static stretching

TMS:

Transcranial magnetic stimulation

References

Download references

Acknowledgements

This study was supported by grants from Dr. David Behm’s Discovery Grant from the Natural Science and Engineering Research Council (NSERC) of Canada and Dr. Andreas Konrad (Project J 4484) from the Austrian Science Fund (FWF).

Funding

This study was supported by grants from Dr. David Behm’s Discovery Grant from the Natural Science and Engineering Research Council of Canada and Dr. Andreas Konrad (Project J 4484) from the Austrian Science Fund (FWF). Andreas Konrad, Natural Science and Engineering Research Council of Canada, RGPIN-2017-03728, David George Behm

Author information

Authors and Affiliations

Authors

Contributions

SHA, SA, and DB were involved in the idea conception. SHA and SA collaborated on organizing the data collection. SHA analyzed the data. All authors aided in the interpretation of the data. SHA wrote the first version of the article, which was then reviewed by all other authors. All authors contributed to the article, approved the submitted version, and read and approved the final manuscript.

Corresponding author

Correspondence to David G. Behm.

Ethics declarations

Conflict of interest

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Additional information

Communicated by Andrew Cresswell.

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Supplementary Information

Below is the link to the electronic supplementary material.

Supplementary file1 (XLSX 14 KB)

Rights and permissions

Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Anvar, S.H., Granacher, U., Konrad, A. et al. Corticospinal excitability and reflex modulation in a contralateral non-stretched muscle following unilateral stretching. Eur J Appl Physiol 123, 1837–1850 (2023). https://doi.org/10.1007/s00421-023-05200-9

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00421-023-05200-9

Keywords

Navigation