Comparing the influence of exercise intensity on brain-derived neurotrophic factor serum levels in people with Parkinson

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ORIGINAL ARTICLE

Comparing the influence of exercise intensity on brain‑derived neurotrophic factor serum levels in people with Parkinson’s disease: a pilot study Ailish O’Callaghan1,2 · Marguerite Harvey1 · David Houghton3 · William K. Gray1   · Kathryn L. Weston4 · Lloyd L. Oates1 · Barbara Romano5 · Richard W. Walker1,6 Received: 15 May 2019 / Accepted: 10 September 2019 © Springer Nature Switzerland AG 2019

Abstract Introduction  Endogenous brain-derived neurotrophic factor (BDNF) is thought to be protective against the neurodegeneration seen in Parkinson’s disease (PD), and is thought to increase during exercise. This has been proposed as a possible mechanism by which exercise improves outcomes for people with PD. We conducted a pilot study to investigate the role of exercise intensity on BDNF levels in people with PD. Methods  Participants of early- to mid-stage disease were recruited from a single PD service in north-east England, UK into two separate studies of exercise in PD, one involving moderate-intensity continuous training (MICT) and one involving high-intensity interval training (HIIT), both had control groups. In both the interventions, participants exercise three times per week for 12 weeks. Blood samples were taken for BDNF analysis at the start and end of the first session and the start and end of the final session, with corresponding samples taken in controls. Results  Data were available for 27 participants (13 intervention, 14 control) in the MICT intervention and 17 (9 intervention, 8 control) in the HIIT intervention. BDNF level did not rise significantly from the start to end of individual sessions. Across the 12 week period, they rose significantly in the HIIT intervention group, but not in controls or the MICT intervention group. Conclusions  High-intensity interval training appears to have a greater impact on BDNF than MICT. Future work should directly compare exercise modalities and investigate the impact of BDNF levels on disease progression and quality of life. Keywords  Parkinson’s disease · High-intensity interval training · Physiotherapy · High-intensity exercise · Brain-derived neurotrophic factor

Introduction * William K. Gray [email protected] 1



Northumbria Healthcare NHS Foundation Trust, North Tyneside General Hospital, Rake Lane, North Shields, Tyne and Wear NE29 8NH, UK

2



North Cumbria University Hospitals NHS Trust, Cumberland Infirmary, Carlisle, UK

3

Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK

4

School of Health and Social Care, Teesside University, Middlesbrough, UK

5

Medical School, University of Brescia, Brescia, Italy

6

Institute of Health and Society, Newcastle University, Newcastle‑upon‑Tyne, UK



Globally, Parkinson’s disease (PD) is the second most common neurodegenerative condition. PD presents with a range of motor (e.g. tremor, balance problems, gait disturbance) and non-motor symptoms (e.g. hallucinations, cognitive impairment, swallowing difficulty, sleep disturbance). Degeneration of dopaminergic neurons of