Transcranial direct current stimulation enhances the efficacy of wearable transcutaneous electrical nerve stimulation for mild knee osteoarthritis in the middle-aged person: a randomized controlled trial

Abstract Objective To evaluate the efficacy of wearable transcutaneous electrical nerve stimulation (TENS) combined with transcranial direct current stimulation (tDCS) in the middle-aged person with mild knee osteoarthritis (KOA). Design Double-blind, randomized clinical trial. Setting A general hos...

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Main Authors: Chun-Ya Xia, Hao-Zhi Niu, Xin-Wen Zhang, Si-Yan Cai, Ying-Jie Fan, Tian-Pei Xie, Peng-Xia Dong, Xiao-Tong Zu, Ze-Lin Su, Xing-Sheng Lu, Yong-Gang Hao, Min Su
Format: Article
Language:English
Published: BMC 2025-07-01
Series:BMC Musculoskeletal Disorders
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Online Access:https://doi.org/10.1186/s12891-025-08924-1
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author Chun-Ya Xia
Hao-Zhi Niu
Xin-Wen Zhang
Si-Yan Cai
Ying-Jie Fan
Tian-Pei Xie
Peng-Xia Dong
Xiao-Tong Zu
Ze-Lin Su
Xing-Sheng Lu
Yong-Gang Hao
Min Su
author_facet Chun-Ya Xia
Hao-Zhi Niu
Xin-Wen Zhang
Si-Yan Cai
Ying-Jie Fan
Tian-Pei Xie
Peng-Xia Dong
Xiao-Tong Zu
Ze-Lin Su
Xing-Sheng Lu
Yong-Gang Hao
Min Su
author_sort Chun-Ya Xia
collection DOAJ
description Abstract Objective To evaluate the efficacy of wearable transcutaneous electrical nerve stimulation (TENS) combined with transcranial direct current stimulation (tDCS) in the middle-aged person with mild knee osteoarthritis (KOA). Design Double-blind, randomized clinical trial. Setting A general hospital. Subjects Participants aged 60–70 with mild KOA (Kellgren–Lawrence grade 1–2). Interventions The experimental group received TENS + tDCS, and the control group received TENS + sham tDCS for four weeks from Monday through Friday. Main measures The primary outcome was Brief Pain Inventory (BPI). The secondary outcomes included participants’ Visual Analog Scale (VAS), step length, cadence, 6-minute walking test (6MWT), active knee range of motion (ROM), and quadriceps strength. The indexes were assessed one week before treatment (T0), two weeks after treatment commencement (T1), four weeks after treatment commencement (T2), one month after treatment cessation (T3), and two months after treatment cessation (T4). Results A total of 110 participants (55 per group) completed the intervention and follow-up. Repeated-measures ANOVA indicated that tDCS significantly improved the efficacy of TENS in alleviating pain and enhancing walking ability among patients with mild KOA. Statistically significant differences in BPI scores were observed between the experimental and control groups at T1 (2.16 vs. 2.45, P = 0.038), T2 (1.17 vs. 1.73, P < 0.001), and T3 (2.17 vs. 2.41, P = 0.021). However, no significant difference was detected at T4 (2.50 vs. 2.63, P = 0.293). Conclusion The four-week combined intervention demonstrated that tDCS potentiated the therapeutic efficacy of TENS in managing mild KOA. The combined protocol exhibited superiority over TENS monotherapy, with sustained benefits observed up to one-month post-intervention. Trial registration This research has been registered in chictr.org.cn (registration number: ChiCTR2200064735) on 15 October 2022, https://www.chictr.org.cn/showproj.html?proj=182561 .
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spelling doaj-art-bec389826d7e47fdb4274e14233e4d4d2025-08-20T04:01:43ZengBMCBMC Musculoskeletal Disorders1471-24742025-07-0126111210.1186/s12891-025-08924-1Transcranial direct current stimulation enhances the efficacy of wearable transcutaneous electrical nerve stimulation for mild knee osteoarthritis in the middle-aged person: a randomized controlled trialChun-Ya Xia0Hao-Zhi Niu1Xin-Wen Zhang2Si-Yan Cai3Ying-Jie Fan4Tian-Pei Xie5Peng-Xia Dong6Xiao-Tong Zu7Ze-Lin Su8Xing-Sheng Lu9Yong-Gang Hao10Min Su11Department of Physical Medicine and Rehabilitation, The Fourth Affiliated Hospital of Soochow University (Dushu Lake Hospital Affiliated to Soochow University)Department of Physical Medicine and Rehabilitation, The Fourth Affiliated Hospital of Soochow University (Dushu Lake Hospital Affiliated to Soochow University)Department of Physical Medicine and Rehabilitation, The Fourth Affiliated Hospital of Soochow University (Dushu Lake Hospital Affiliated to Soochow University)Department of Physical Medicine and Rehabilitation, The Fourth Affiliated Hospital of Soochow University (Dushu Lake Hospital Affiliated to Soochow University)Department of Physical Medicine and Rehabilitation, The Fourth Affiliated Hospital of Soochow University (Dushu Lake Hospital Affiliated to Soochow University)Department of Physical Medicine and Rehabilitation, The Fourth Affiliated Hospital of Soochow University (Dushu Lake Hospital Affiliated to Soochow University)Department of Physical Medicine and Rehabilitation, The Fourth Affiliated Hospital of Soochow University (Dushu Lake Hospital Affiliated to Soochow University)Department of Physical Medicine and Rehabilitation, The Fourth Affiliated Hospital of Soochow University (Dushu Lake Hospital Affiliated to Soochow University)Department of Physical Medicine and Rehabilitation, The Fourth Affiliated Hospital of Soochow University (Dushu Lake Hospital Affiliated to Soochow University)School of Public Health, Suzhou Medical College of Soochow UniversityDepartment of Rehabilitation Medicine, Rehabilitation Institute of Soochow UniversityDepartment of Physical Medicine and Rehabilitation, The Fourth Affiliated Hospital of Soochow University (Dushu Lake Hospital Affiliated to Soochow University)Abstract Objective To evaluate the efficacy of wearable transcutaneous electrical nerve stimulation (TENS) combined with transcranial direct current stimulation (tDCS) in the middle-aged person with mild knee osteoarthritis (KOA). Design Double-blind, randomized clinical trial. Setting A general hospital. Subjects Participants aged 60–70 with mild KOA (Kellgren–Lawrence grade 1–2). Interventions The experimental group received TENS + tDCS, and the control group received TENS + sham tDCS for four weeks from Monday through Friday. Main measures The primary outcome was Brief Pain Inventory (BPI). The secondary outcomes included participants’ Visual Analog Scale (VAS), step length, cadence, 6-minute walking test (6MWT), active knee range of motion (ROM), and quadriceps strength. The indexes were assessed one week before treatment (T0), two weeks after treatment commencement (T1), four weeks after treatment commencement (T2), one month after treatment cessation (T3), and two months after treatment cessation (T4). Results A total of 110 participants (55 per group) completed the intervention and follow-up. Repeated-measures ANOVA indicated that tDCS significantly improved the efficacy of TENS in alleviating pain and enhancing walking ability among patients with mild KOA. Statistically significant differences in BPI scores were observed between the experimental and control groups at T1 (2.16 vs. 2.45, P = 0.038), T2 (1.17 vs. 1.73, P < 0.001), and T3 (2.17 vs. 2.41, P = 0.021). However, no significant difference was detected at T4 (2.50 vs. 2.63, P = 0.293). Conclusion The four-week combined intervention demonstrated that tDCS potentiated the therapeutic efficacy of TENS in managing mild KOA. The combined protocol exhibited superiority over TENS monotherapy, with sustained benefits observed up to one-month post-intervention. Trial registration This research has been registered in chictr.org.cn (registration number: ChiCTR2200064735) on 15 October 2022, https://www.chictr.org.cn/showproj.html?proj=182561 .https://doi.org/10.1186/s12891-025-08924-1Transcranial direct current stimulationTranscutaneous electrical nerve stimulationKnee osteoarthritisChronic painPhysical therapyRehabilitation
spellingShingle Chun-Ya Xia
Hao-Zhi Niu
Xin-Wen Zhang
Si-Yan Cai
Ying-Jie Fan
Tian-Pei Xie
Peng-Xia Dong
Xiao-Tong Zu
Ze-Lin Su
Xing-Sheng Lu
Yong-Gang Hao
Min Su
Transcranial direct current stimulation enhances the efficacy of wearable transcutaneous electrical nerve stimulation for mild knee osteoarthritis in the middle-aged person: a randomized controlled trial
BMC Musculoskeletal Disorders
Transcranial direct current stimulation
Transcutaneous electrical nerve stimulation
Knee osteoarthritis
Chronic pain
Physical therapy
Rehabilitation
title Transcranial direct current stimulation enhances the efficacy of wearable transcutaneous electrical nerve stimulation for mild knee osteoarthritis in the middle-aged person: a randomized controlled trial
title_full Transcranial direct current stimulation enhances the efficacy of wearable transcutaneous electrical nerve stimulation for mild knee osteoarthritis in the middle-aged person: a randomized controlled trial
title_fullStr Transcranial direct current stimulation enhances the efficacy of wearable transcutaneous electrical nerve stimulation for mild knee osteoarthritis in the middle-aged person: a randomized controlled trial
title_full_unstemmed Transcranial direct current stimulation enhances the efficacy of wearable transcutaneous electrical nerve stimulation for mild knee osteoarthritis in the middle-aged person: a randomized controlled trial
title_short Transcranial direct current stimulation enhances the efficacy of wearable transcutaneous electrical nerve stimulation for mild knee osteoarthritis in the middle-aged person: a randomized controlled trial
title_sort transcranial direct current stimulation enhances the efficacy of wearable transcutaneous electrical nerve stimulation for mild knee osteoarthritis in the middle aged person a randomized controlled trial
topic Transcranial direct current stimulation
Transcutaneous electrical nerve stimulation
Knee osteoarthritis
Chronic pain
Physical therapy
Rehabilitation
url https://doi.org/10.1186/s12891-025-08924-1
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