The influence of red light combined with neuromuscular electrical stimulation on the rehabilitation effect of patients after total knee arthroplasty Abstract

DOI: 10.12201/bmr.202511.00073

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  Abstract: Objective: To explore the effect of red light combined with neuromuscular electrical stimulation (NMES) therapy on the recovery of quadriceps muscle strength, knee joint range of motion and early functional activity ability in patients after total knee arthroplasty (TKA). Methods: Sixty patients after TKA were randomly divided into the experimental group and the control group, with 30 patients in each group. The control group received conventional rehabilitation treatment. The experimental group received red light combined with NMES therapy in addition to the conventional rehabilitation. Both groups received treatment once a day and continued until discharge on the 5th day after surgery. Data on quadriceps muscle strength (Lovett 6-level classification method), joint range of motion (AROM/PROM), knee joint function HSS evaluation scale, and timed standing-walking test (TUGT) were collected on the day of surgery, at discharge (5 days after surgery), and 1 month after surgery. Results: On the day of surgery, there was no statistically significant difference in the baseline levels of all indicators between the two groups (P > 0.05). On the 5th day after surgery, the experimental group showed significant superiority over the control group in quadriceps muscle strength, knee joint AROM and PROM, HSS total score and each sub-item score, and TUGT time (all P < 0.05). One month after surgery, the experimental group continued to show significant superiority over the control group in the improvement of all indicators (all P < 0.001). Conclusion: In the early stage after TKA, the rehabilitation program combining red light and NMES treatment can effectively accelerate the recovery of quadriceps muscle strength, improve knee joint range of motion, enhance overall functional status and activity ability, and is an efficient and worthy clinical rehabilitation program.

  Key words: Total knee arthroplasty; Neuromuscular electrical stimulation; Red light therapy; Rehabilitation

  Submit time: 13 January 2026

  Copyright: The copyright holder for this preprint is the author/funder, who has granted biomedRxiv a license to display the preprint in perpetuity.
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