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. 2025 May;33(5):1834-1843.
doi: 10.1002/ksa.12517. Epub 2024 Nov 5.

Effect of neuromuscular control on the shoulder function of patients with healed rotator cuff and those with retear after arthroscopic rotator cuff repair

Jin Hyuck Lee  1 , Ji Soon Park  2 , Woong Kyo Jeong  1   3
Affiliations

Effect of neuromuscular control on the shoulder function of patients with healed rotator cuff and those with retear after arthroscopic rotator cuff repair

Jin Hyuck Lee et al. Knee Surg Sports Traumatol Arthrosc. 2025 May.

Abstract

Purpose: To compare functional outcomes such as muscle strength, neuromuscular control and patient-reported outcomes (PROs) between patients with healed rotator cuffs and those with retears after arthroscopic rotator cuff repair (RCR).

Methods: One hundred and nine patients who underwent arthroscopic RCR were included (85 in the healed group, 24 in the retear group). Shoulder muscle strength and neuromuscular control index (acceleration time [AT]) were evaluated using an isokinetic device. PROs were assessed using the pain visual analogue scale (VAS), Simple Shoulder Test (SST), American Shoulder and Elbow Surgeons (ASES) and University of California at Los Angeles (UCLA) scores. Continuous variables were compared using independent t tests. Multiple linear regression analysis was used to identify the influence of the predictor variables on the dependent variable.

Results: The muscle strength and ATs for external rotators (ERs), internal rotators (IRs) and forward flexors as well as PROs including VAS, SST and ASES scores, were not significantly different between the two groups pre- and postoperatively (n.s.). Multiple linear regression analysis revealed that postoperative ATs for the IRs (p = 0.006) and ERs (p = 0.028) in the operated shoulders were closely associated with the postoperative UCLA score.

Conclusions: Compared with the healed group after arthroscopic RCR, the retear group had no clinically relevant differences in muscle strength, ATs and PROs, including VAS, SST, ASES and UCLA scores. However, postoperative ATs for IRs and ERs in the operated shoulders were a significant predictor of postoperative UCLA scores. Therefore, clinicians and therapists need to be aware of the importance of neuromuscular control in patients who have undergone arthroscopic RCR and prioritize therapeutic exercises to restore neuromuscular control.

Level of evidence: Level III.

Keywords: UCLA score; acceleration time; arthroscopic rotator cuff repair; muscle strength; neuromuscular control.

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References

REFERENCES

    1. Abed, V., Kapp, S., Nichols, M., Brunty, N., Conley, C.E.W., Jacobs, C.A. et al. (2024) ASES and UCLA are responsive patient‐reported outcome measures after rotator cuff repair: a systematic review and meta‐analysis. The American Journal of Sports Medicine, 17, 3635465231213870. Available from: https://doi.org/10.1177/03635465231213870
    1. Bandholm, T., Rasmussen, L., Aagaard, P., Diederichsen, L. & Jensen, B.R. (2008) Effects of experimental muscle pain on shoulder‐abduction force steadiness and muscle activity in healthy subjects. European Journal of Applied Physiology, 102, 643–650. Available from: https://doi.org/10.1007/s00421-007-0642-1
    1. Bigoni, M., Gorla, M., Guerrasio, S., Brignoli, A., Cossio, A., Grillo, P. et al. (2009) Shoulder evaluation with isokinetic strength testing after arthroscopic rotator cuff repairs. Journal of Shoulder and Elbow Surgery, 18, 178–183. Available from: https://doi.org/10.1016/j.jse.2008.09.002
    1. Camargo, P.R., Ávila, M.A., Asso, N.A. & Salvini, T.F. (2010) Muscle performance during isokinetic concentric and eccentric abduction in subjects with subacromial impingement syndrome. European Journal of Applied Physiology, 109, 389–395. Available from: https://doi.org/10.1007/s00421-010-1365-2
    1. Campbell, S.T., Ecklund, K.J., Chu, E.H., McGarry, M.H., Gupta, R. & Lee, T.Q. (2014) The role of pectoralis major and latissimus dorsi muscles in a biomechanical model of massive rotator cuff tear. Journal of Shoulder and Elbow Surgery, 23, 1136–1142. Available from: https://doi.org/10.1016/j.jse.2013.11.030