Eight hours a week, and a memory score that barely moved
What happened
A seven-year study has found that people with Parkinson's disease who were the most physically active had far slower decline in both their thinking and their movement than those who were the least active. The research was published in Neurology, the medical journal of the American Academy of Neurology, and was reported more widely on 23 October 2026. The lead author is Dr Dong-Woo Ryu of the University of Cincinnati. The team followed 294 adults who had mild to moderate Parkinson's disease. Their average age was 66. They were tracked for up to seven years. Each year, participants took a thinking and memory test scored out of 30, and had their Parkinson's symptoms assessed on a scale running from 0 to 132, where a higher score means worse movement symptoms. At the start, the average movement score was 23. Activity was recorded through questionnaires covering work, home life and hobbies. The researchers then split people into three groups by how many hours of moderate or vigorous activity they did each week: - the least active, up to 4 hours a week - the moderately active, 4 to 8 hours a week - the most active, more than 8 hours a week The results split the same way. On the thinking and memory test, the least active group lost about 0.478 points a year. The moderately active group lost about 0.090 points. The most active group lost about 0.007 points a year, which is close to no change at all. On movement symptoms, the least active group got slightly worse each year, by about 0.143 points. The moderately active group improved by about 0.225 points a year. The most active group improved by about 0.783 points a year. The pattern held after the researchers adjusted for age, sex and how long people had been living with Parkinson's. Dr Ryu said the study found that physical activity "may have dual benefits" — meaning it was linked to slower decline in thinking as well as in movement.
Why this matters
Parkinson's disease is often described only as a movement condition. Tremor, stiffness, slowness, problems with balance. For many people, the harder part is the thinking. Parkinson's can also affect memory, attention and planning, and that side of it tends to get less attention in public conversation and sometimes in appointments too. What makes this study notable is that it looked at both at once, in the same people, over the same seven years. Most research has tended to treat the two separately. There is also something reassuring in how ordinary the activity was. This was not a trial of a specialist exercise programme in a laboratory. People reported what they already did — work, housework, hobbies, recreation. The groups were defined simply by how many hours of it added up. Eight hours a week sounds like a lot until you break it down. It is a little over an hour a day of activity that leaves you warmer and slightly out of breath. For some people that is a gym. For plenty of others it is gardening, cleaning, walking the dog, a swim, dancing, or carrying shopping up a hill. The researchers are careful not to oversell it, and we will come to that. But exercise is one of the very few things in Parkinson's care that a person can start on their own, today, without waiting for an appointment or a prescription.
What the evidence actually says
This was an observational study. That matters a great deal here. Observational means the researchers watched what happened. They did not assign some people to exercise and others not to. So the study can show that higher activity and slower decline went together. It cannot show that the exercise caused the slower decline. The obvious alternative explanation is the reverse one. People whose Parkinson's is progressing more slowly may simply find it easier to stay active. The researchers acknowledge this, and say more research is needed before anyone claims exercise slows the disease itself. There are other limits worth stating plainly. Activity was self-reported on questionnaires. People are not reliable narrators of their own exercise. Some will have over-estimated and some under-estimated. Participants generally had reasonably good thinking and memory at the start, so the findings should not be stretched to people whose cognition is already significantly affected. And the differences between groups, while consistent, were small in any single year. Half a point a year on a 30-point test is not something a person would notice. The researchers' argument is that small annual differences add up across years, which is plausible but is an argument rather than a measurement. The study was funded by the Gardner Family Foundation and the Precision Medicine in Neurodegenerative Diseases Fund. What the evidence supports is this: among 294 people with mild to moderate Parkinson's followed for up to seven years, more activity went with slower decline in both movement and thinking, in a graded way, across three different ways of measuring activity. That is a genuinely encouraging signal. It is not proof.
Qurexa perspective
People with Parkinson's often have one of the more demanding medication routines in healthcare. Doses can be timed to the half-hour, several times a day, and the difference between on time and late is something people feel in their body rather than read on a chart. Collecting a prescription can also be one of the harder trips of the week, particularly when movement symptoms are at their worst or when a pharmacy is not close by. That is the practical gap Qurexa works in. We deliver prescriptions across Lincolnshire, and we support people with keeping to medication schedules that are genuinely difficult to keep to. The connection to this study is simple and we will not stretch it. If a trip to the pharmacy is using up a chunk of someone's limited energy for the week, that is energy not going into the walk, the swim or the garden. Taking that errand off the list is a small thing, but it is a real one.
Practical advice
If you or someone close to you has Parkinson's, here is how to use a study like this sensibly. Start from where you are, not from the eight-hour figure. The study found a step up in benefit from the least active group to the moderately active group as well. Going from almost nothing to a few hours a week is where the biggest change in the data appeared. Talk to your specialist team first. This is important. Parkinson's affects balance, and falls are a serious risk. A physiotherapist who knows Parkinson's can tell you which activities are safe for you and which are not. Ask for a referral if you do not already have one. Count what you already do. Housework, shopping, gardening and walking all counted in this study. You may be closer to the middle group than you think. Pick things you will keep doing. The study measured years, not weeks. Something you mildly enjoy and do every day beats something you dread and abandon in a fortnight. Keep taking your medication exactly as prescribed. Exercise is not an alternative to treatment, and nothing in this study suggests it is. Parkinson's UK runs local groups and exercise classes designed for people with the condition, and its helpline can point you to what exists near you. And if your symptoms are changing, or your medication no longer seems to be working the way it did, that is a conversation for your specialist nurse or consultant rather than something to manage alone.
What to know
A study of 294 adults with mild to moderate Parkinson's disease, followed for up to seven years and published in the journal Neurology, found that the most physically active group declined far more slowly on both thinking tests and movement symptoms than the least active group. The most active group, doing more than eight hours a week of moderate or vigorous activity, lost about 0.007 points a year on a 30-point memory test. The least active group, doing up to four hours, lost about 0.478 points a year. The study was observational. It shows an association, not proof that exercise slows Parkinson's. Activity was self-reported, and the researchers say more work is needed. If you have Parkinson's and want to be more active, speak to your specialist team or a physiotherapist first, because balance and falls need to be taken into account. Sources: Neurology (American Academy of Neurology), "Physical Activity and Motor and Cognitive Progression in Parkinson Disease", Ryu D-W et al., 7 October 2026, volume 107 issue 9, DOI 10.1212/WNL.0000000000218682, https://www.neurology.org; ScienceDaily, "Scientists discover a surprising double benefit of exercise for Parkinson's", 23 October 2026, https://www.sciencedaily.com/releases/2026/10/261022081306.htm; NHS, "Parkinson's disease", https://www.nhs.uk/conditions/parkinsons-disease/. This article is for general information and does not replace advice from a doctor, pharmacist, physiotherapist or other qualified healthcare professional. Do not change your medication or start a new exercise programme without speaking to your healthcare team.
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