Journal of Movement Disorders

Original Articles

Factors associated with response to exercise in patients with Parkinson's disease: Myung Jun Lee, Jinse Park, Dong-Woo Ryu, Dallah Yoo, Sang-Myung Cheon; Received March 17, 2025 Accepted May 16, 2025 Published online May 16, 2025; DOI: https://doi.org/10.14802/jmd.25068 [Accepted]

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Abstract PDF: Introduction
Exercises have been proposed as adjuvants for the treatment of Parkinson's disease (PD); however, responses to exercise interventions have shown inconsistent results. We investigated clinical factors associated with improvements in motor deficits after exercise.
Methods
85 PD patients were enrolled from five tertiary hospitals and classified into four exercise groups: home exercises, strength training, Tai Chi, and yoga. Clinical measurements of the motor and non-motor features of PD were assessed at baseline and 12 weeks after the exercise intervention. We employed principal component analysis (PCA) to reduce variables into ten factors and then examined associations of baseline characteristics with percentage improvement in the Movement Disorder Society Unified Parkinson's Disease Rating Scale part III (MDS-UPDRS III) using the Bayesian regression model.
Results
In the multivariate Bayesian regression model including ten PCA-driven factors, the percentage improvement of the MDS-UPDRS III was associated with factors including prominent motor deficits (posterior interval; mean ± SD, – 3.9 ± 1.7) and non-motor symptoms such as depression, anxiety, and subjective memory impairment (2.5 ± 1.5). Another factor related to functional impairments in gait and postural control was associated with less improvement after the exercise intervention (3.3 ± 1.7). In the subgroup analyses, motor features were associated with improvement in the home exercise and strength training groups, whereas mood disturbance, fatigue, and subjective cognitive impairment were related to changes in the home exercise and Tai Chi groups.
Conclusions
Our results suggest that individual phenotypes of PD patients may be associated with clinical improvement following exercise.

Comparison of the Impact of Various Exercise Modalities on Parkinson’s Disease: Jinse Park, Sang-Myung Cheon, Myung Jun Lee, Dong-Woo Ryu, Dallah Yoo; Received February 13, 2025 Accepted April 15, 2025 Published online April 15, 2025; DOI: https://doi.org/10.14802/jmd.25038 [Epub ahead of print]

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Objective
Exercise is a critical nonpharmacological intervention for Parkinson’s disease (PD); however, comparative evidence on the efficacy of different exercise modalities is limited. This study aimed to compare the effects of tai chi, strength training, yoga, and home-based exercises on motor function in patients with PD.
Methods
In this multicenter, open-label, randomized clinical trial, 99 patients with PD were allocated to one of four exercise interventions: tai chi, strength training, yoga, or home-based exercises. Each intervention consisted of 12 weeks of supervised sessions, followed by 12 weeks of independent practice. The primary outcomes included the Movement Disorder Society Unified Parkinson’s Disease Rating Scale (MDS-UPDRS) Part III and timed up-and-go (TUG) test parameters. The assessed secondary outcomes included physical activity (measured via short physical performance battery and the 6-minute walking test [6MWT]), balance (measured via the Mini-BEST), and freezing of gait (measured via the New Freezing of Gait Questionnaire).
Results
Home exercise and tai chi demonstrated significant improvements in the MDS-UPDRS Part III scores over 24 weeks. The 6MWT was improved by home exercises and tai chi; additionally, the Mini-BEST test scores were enhanced by strength exercises and yoga. The total duration and forward movement of the TUG test, as well as the turning duration measured via the wearable sensor, were markedly improved in the yoga group.
Conclusion
Our results support the notion that various types of adherence to and outcomes of exercise can be observed in real-world settings, even though the effectiveness of exercise is well established. These findings highlight the importance of tailoring exercise regimens by considering individual patients in PD management.

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Summary of the best evidence for non-pharmaceutical interventions for mild cognitive impairment in Parkinson’s disease
Yud Dan Liu, Hui Fang Li, Ya Xian Zhai, Yun Xia Shen, Jinmei Yang, Li Mei He, Ting Shen
Frontiers in Neurology.2025;[Epub] CrossRef

Trends in Physiotherapy Interventions and Medical Costs for Parkinson’s Disease in South Korea, 2011–2020: Dong-Woo Ryu, Jinse Park, Myung Jun Lee, Dallah Yoo, Sang-Myung Cheon; J Mov Disord. 2024;17(3):270-281. Published online March 19, 2024; DOI: https://doi.org/10.14802/jmd.23269

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Abstract PDF Supplementary Material: Objective
Physiotherapy (PT), which is an effective strategy for managing Parkinson’s disease (PD), can influence health care utilization. We analyzed trends in health care utilization, PT interventions, and medical costs among patients with PD.
Methods
Using data from the Korean National Health Insurance Service from 2011 to 2020, we analyzed the number of patients with PD and their health care utilization and assessed the odds ratio (OR) for receiving regular PTs.
Results
Over 10 years, 169,613 patients with PD were included in the analysis. The number of patients with PD increased annually from 49,417 in 2011 to 91,841 in 2020. The number of patients with PD receiving PT increased from 4,847 (9.81%) in 2011 to 13,163 (14.33%) in 2020, and the number of PT prescriptions increased from 81,220 in 2011 to 377,651 in 2019. Medical costs per patient with PD increased from 1,686 United States dollars (USD) in 2011 to 3,202 USD in 2020. The medical expenses for each patient with PD receiving PT increased from 6,582 USD in 2011 to 13,475 USD in 2020. Moreover, regular PTs were administered to 31,782 patients (18.74%) and were administered only through hospitalization. Those patients in their 50s with disabilities demonstrated a high OR for regular PTs, whereas those aged 80 years or older and residing outside of Seoul had a low OR.
Conclusion
The PD burden increased in South Korea between 2011 and 2020, as did health care utilization and medical costs. A significant increase in medical expenses can be associated with increased PD incidence and PT interventions. Regular PT applications remain restricted and have barriers to access.

Fasting Plasma Glucose Levels and Longitudinal Motor and Cognitive Outcomes in Parkinson’s Disease Patients: Ko-Eun Choi, Dong-Woo Ryu, Yoon-Sang Oh, Joong-Seok Kim; J Mov Disord. 2024;17(2):198-207. Published online March 6, 2024; DOI: https://doi.org/10.14802/jmd.23264

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Abstract PDF Supplementary Material

Objective
Hyperglycemia and diabetes mellitus have been identified as poor prognostic factors for motor and nonmotor outcomes in patients with Parkinson’s disease (PD), although there is some controversy with this finding. In the present study, we investigated the effects of fasting plasma glucose (FPG) levels on longitudinal motor and cognitive outcomes in PD patients.
Methods
We included a total of 201 patients who were diagnosed with PD between January 2015 and January 2020. The patients were categorized based on FPG level into euglycemia (70 mg/dL < FPG < 100 mg/dL), intermediate glycemia (100 mg/dL ≤ FPG < 126 mg/dL), and hyperglycemia (FPG ≥ 126 mg/dL), and longitudinal FPG trajectories were analyzed using group-based trajectory modeling. Survival analysis was conducted to determine the time until motor outcome (Hoehn and Yahr stage ≥ 2) and the conversion from normal cognition to mild cognitive impairment.
Results
Among the patient cohort, 82 had euglycemia, 93 had intermediate glycemia, and 26 had hyperglycemia. Intermediate glycemia (hazard ratio 1.747, 95% confidence interval [CI] 1.083–2.816, p = 0.0221) and hyperglycemia (hazard ratio 3.864, 95% CI 1.996–7.481, p < 0.0001) were found to be significant predictors of worsening motor symptoms. However, neither intermediate glycemia (hazard ratio 1.183, 95% CI 0.697–2.009, p = 0.5339) nor hyperglycemia (hazard ratio 1.297, 95% CI 0.601–2.800, p = 0.5078) demonstrated associations with the longitudinal progression of cognitive impairment. Diabetes mellitus, defined by self-reported medical history, was not related to poor motor or cognitive impairment outcomes.
Conclusion
Our results suggest that both impaired glucose tolerance and hyperglycemia could be associated with motor progression in PD patients.

Citations

Citations to this article as recorded by

Type 2 Diabetes Mellitus and Parkinson's Disease: An Emerging Link
Shubham Teli, Mallappa Shalavadi, Chandrashekhar V.M., Lingaraj Anawal
Current Signal Transduction Therapy.2025;[Epub] CrossRef

Erratum

The Impact of Impulsivity on Quality of Life in Early Drug-Naïve Parkinson’s Disease Patients: Dong-Woo Ryu, Joong-Seok Kim, Sang-Won Yoo, Yoon-Sang Oh, Kwang-Soo Lee; J Mov Disord. 2021;14(2):176-176. Published online May 26, 2021; DOI: https://doi.org/10.14802/jmd.19004.e; Corrects: J Mov Disord 2019;12(3):172

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Original Article

The Impact of Impulsivity on Quality of Life in Early Drug-Naïve Parkinson’s Disease Patients: Dong-Woo Ryu, Joong-Seok Kim, Sang-Won Yoo, Yoon-Sang Oh, Kwang-Soo Lee; J Mov Disord. 2019;12(3):172-176. Published online August 9, 2019; DOI: https://doi.org/10.14802/jmd.19004; Correction in: J Mov Disord 2021;14(2):176

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Abstract PDF

Objective
Impulse control disorders (ICDs) in Parkinson’s disease (PD) are mostly related to dopamine replacement therapy (DRT); however, drug-naïve PD patients have also frequently experienced impulsivity. This phenomenon makes clinicians hesitate treating patients with DRT. In this study, we assessed the effect of impulsivity on quality of life (QOL) in drug-naïve PD patients.
Methods
Two hundred three newly diagnosed, nonmedicated PD patients were enrolled, and they received structured clinical interviews, physical examinations and validated questionnaires to evaluate motor and nonmotor symptoms and QOL. Impulsivity was evaluated using the Questionnaire for Impulsive-Compulsive Disorders in Parkinson’s Disease-Rating Scale (QUIP-RS).
Results
Thirty-eight patients (18.7%) had impulsivity with QUIP-RS scores ≥ 1 and 4 patients (2.0%) were diagnosed with combined ICDs. Motor and nonmotor symptoms were significantly correlated with the Parkinson’s Disease Questionnaire-39 summary index. Female sex and QUIP-RS scores were also correlated with QOL in drug-naïve PD patients.
Conclusion
The results of the present study showed that impulsivity negatively influences QOL in early drug-naïve PD patients. In addition, more severe motor and nonmotor symptoms were also associated with lower QOL. Such findings complicate treatment but provide valuable information for managing early PD.

Citations

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Frequency of Impulsive-Compulsive Behavior and Associated Psychological Factors in Parkinson’s Disease: Lack of Control or Too Much of It?
Alexandros Kapsomenakis, Dimitrios Kasselimis, Emily Vaniotis, Anastasia Bougea, Christos Koros, Athina Maria Simitsi, Leonidas Stefanis, Constantin Potagas
Medicina.2023; 59(11): 1942. CrossRef
Locus Coeruleus Integrity Is Linked to Response Inhibition Deficits in Parkinson's Disease and Progressive Supranuclear Palsy
Rong Ye, Frank H. Hezemans, Claire O'Callaghan, Kamen A. Tsvetanov, Catarina Rua, P. Simon Jones, Negin Holland, Maura Malpetti, Alexander G. Murley, Roger A. Barker, Caroline H. Williams-Gray, Trevor W. Robbins, Luca Passamonti, James B. Rowe
The Journal of Neuroscience.2023; 43(42): 7028. CrossRef
Neuropsychiatric Symptoms in Parkinson's Disease After Subthalamic Nucleus Deep Brain Stimulation
Weibing Liu, Tatsuya Yamamoto, Yoshitaka Yamanaka, Masato Asahina, Tomoyuki Uchiyama, Shigeki Hirano, Keisuke Shimizu, Yoshinori Higuchi, Satoshi Kuwabara
Frontiers in Neurology.2021;[Epub] CrossRef
Dopamine genetic risk score predicts impulse control behaviors in Parkinson’s disease
Alison Hall, Samuel R. Weaver, Lindsey J. Compton, Winston D. Byblow, Ned Jenkinson, Hayley J. MacDonald
Clinical Parkinsonism & Related Disorders.2021; 5: 100113. CrossRef
A Review of the Concept of Impulsivity
Mohammed Munther Al-Hammouri, Jehad A. Rababah, Celeste Shawler
Advances in Nursing Science.2021; 44(4): 357. CrossRef
Assessment of therapeutic strategies for management of impulse control disorder in Parkinson’s disease
Mayela Rodríguez-Violante, Yazmín Ríos-Solís, Oscar Esquivel-Zapata, Fanny Herrera, Susana López-Alamillo, Cynthia Sarabia-Tapia, Amin Cervantes-Arriaga
Arquivos de Neuro-Psiquiatria.2021; 79(11): 989. CrossRef

Letter to the editor

Camptocormia with Transient Ischemic Attack: Ju-Hee Oh, Dong-Woo Ryu, Si-Hoon Lee, Joong-Seok Kim; J Mov Disord. 2017;10(1):62-63. Published online January 18, 2017; DOI: https://doi.org/10.14802/jmd.16043

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