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Knee position sense and knee flexor neuromuscular function are similarly altered after two submaximal eccentric bouts

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Abstract

Purpose

This study examined eccentric-induced fatigue effects on knee flexor (KF) neuromuscular function and on knee position sense. This design was repeated across two experimental sessions performed 1 week apart to investigate potential repeated bout effects.

Methods

Sixteen participants performed two submaximal bouts of KF unilateral eccentric contractions until reaching a 20% decrease in maximal voluntary isometric contraction force. Knee position sense was evaluated with position-matching tasks in seated and prone positions at 40° and 70° of knee flexion so that KF were either antagonistic or agonistic during the positioning movement. The twitch interpolation technique was used to assess KF neuromuscular fatigue. Perceived muscle soreness was also assessed. Measurements were performed before, immediately (POST) and 24 h after (POST24) each eccentric bout.

Results

No repeated bout effect on neuromuscular function and proprioceptive parameters was observed. At POST, central and peripheral factors contributed to the force decrement as shown by significant decreases in voluntary activation level (− 3.8 ± 4.8%, p < 0.01) and potentiated doublet torque at 100 Hz (− 10 ± 15.8%, p < 0.01). At this time point, position-matching errors significantly increased by 1.7 ± 1.9° in seated position at 40° (p < 0.01). At POST24, in presence of muscle soreness (p < 0.05), although KF neuromuscular function had recovered, position-matching errors increased by 0.6 ± 2.6° in prone position at 40° (p < 0.01).

Conclusion

These results provide evidence that eccentric-induced position sense alterations may arise from central and/or peripheral mechanisms depending on the testing position.

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Data availability

The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

Abbreviations

ANOVA:

Analysis of variance

BF:

Biceps femoris

CAR:

Central activation ratio

Dtsup :

Superimposed doublet torque at 100 Hz

Dt10Hz :

Potentiated doublet amplitude at 10 Hz

Dt100Hz :

Potentiated doublet torque at 100 Hz

ECC1:

First bout of submaximal eccentric contractions

ECC2:

Second bout of submaximal eccentric contractions

JPM:

Joint position-matching

JPMS40 :

Joint position-matching in seated position at 40° of knee flexion

JPMS70 :

Joint position-matching in seated position at 70° of knee flexion

JPMP40 :

Joint position-matching in prone position at 40° of knee flexion

JPMP70 :

Joint position-matching in prone position at 70° of knee flexion

KF:

Knee flexors

MVIC:

Maximal voluntary isometric contraction

M-wave:

Maximal compound muscle action potentials

RMS:

Root mean square

Twpot :

Potentiated single twitch

VA:

Voluntary activation level

η 2 p :

Partial eta-squared

1RM ECC:

Eccentric unilateral 1 repetition maximum

References

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Acknowledgements

The authors would like to sincerely thank Nicolas Reneaud and Amyn Jaafar for their precious help regarding the development of the custom-made MatLaB algorithm to automatically compute knee angles. The authors would also like to thank participants for their voluntary participation and for their commitment.

Funding

The authors did not receive support from any organization for the submitted work.

Author information

Authors and Affiliations

Authors

Contributions

All authors contributed to the study conception and design. FDS, BC, and JG conducted the experiments. FDS, FM and SSC analyzed data. FDS, FM and SSC wrote the first draft of the manuscript. All authors contributed to the writing and approved the final version of the manuscript.

Corresponding author

Correspondence to Flavio Da Silva.

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Conflict of interest

The authors have no conflicts of interest to declare that are relevant to the content of this article.

Consent to participate

Informed consent was obtained from all individual participants included in the study.

Consent for publication

Patients signed informed consent regarding publication of their data.

Ethics approval

Approval was obtained from national Ethics Committee (Protection Committee of People for Biomedical Research Southeast III, France; Authorization Number 2020-A02811-38). This study was conducted in accordance with the latest version of the Declaration of Helsinki.

Additional information

Communicated by Toshio Moritani.

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Da Silva, F., Monjo, F., Gioda, J. et al. Knee position sense and knee flexor neuromuscular function are similarly altered after two submaximal eccentric bouts. Eur J Appl Physiol 123, 311–323 (2023). https://doi.org/10.1007/s00421-022-05063-6

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  • DOI: https://doi.org/10.1007/s00421-022-05063-6

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