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Movement restriction does not modulate sensory and perceptual effects of exercise-induced arm pain

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Abstract

Background

Movement restriction has been proposed as an important modulator of changes in sensory and perceptual function and motor imagery performance that are observed in musculoskeletal pain syndromes. There are no empirical data to support this view.

Purpose

The primary objective of this experiment was to determine the effects of movement restriction on local and widespread sensory, perceptual and motor imagery changes after exercise-induced muscular pain. Further objectives were to investigate whether changes in sensory perception are correlated with pain intensity and tactile acuity or motor imagery performance.

Methods

In forty healthy volunteers, delayed onset muscle soreness (DOMS) of the non-dominant elbow flexors was induced using eccentric contractions until exhaustion. Participants were then randomised into two groups: a movement restriction group (wearing a sling) or a control group (not wearing a sling). Sensory and perceptual functions were measured using a range of sensory tests and a motor imagery performance task (left/right limb judgements).

Results

Movement restriction did not modulate any of the measures. We found concurrent mechanical hypoesthesia (p < 0.01), reduced tactile acuity (p = 0.02) and pressure hyperalgesia (p < 0.01) at the painful side. We found evidence of widespread pressure hyperalgesia. Impaired tactile acuity was associated with a decrease in pain threshold to pressure (r = −0.34, p = 0.03). Motor imagery performance was unchanged (p > 0.35) by pain or movement restriction.

Conclusion

Short-term movement restriction did not influence local and widespread sensory changes induced by experimentally induced muscular pain.

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Abbreviations

ANOVA:

Analysis of variance

DOMS:

Delayed onset muscle soreness

η 2 :

Eta squared

CRPS:

Complex regional pain syndrome

LBP:

Low back pain

LLR:

Limb laterality recognition

MDT:

Mechanical detection threshold

1RM:

One repetition maximum

PASS-20:

Short-form pain anxiety symptoms scale

PPT:

Pressure pain threshold

TPD:

Two-point discrimination

VAS:

Visual analogue scale

SD:

Standard deviation

References

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Acknowledgments

MH was supported by a Postdoctoral Fellowship from the German Academic Exchange Service (DAAD). GLM is supported by the National Health and Medical Research Council (NHMRC) of Australia (NHMRC ID 1061279). This experiment was supported by NHMRC project grant (ID APP1008017). T.R.S. was supported by the Canadian Institutes of Health Research Postdoctoral Training Fellowship (ID223354) and a early career fellowship from the NHMRC of Australia (ID 1054041). JHM was supported by project grants from the NHMRC of Australia (ID 1008003 and 1043621).

Conflict of interest

The authors report no conflicts of interest.

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Correspondence to Markus Hübscher.

Additional information

Communicated by Dick F. Stegeman.

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Hübscher, M., Tu, S., Stanton, T. et al. Movement restriction does not modulate sensory and perceptual effects of exercise-induced arm pain. Eur J Appl Physiol 115, 1047–1055 (2015). https://doi.org/10.1007/s00421-014-3085-5

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  • DOI: https://doi.org/10.1007/s00421-014-3085-5

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