- Design
- Prospective longitudinal cohort
- Population
- 294 adults with mild-to-moderate Parkinson disease
- Primary outcome
- Annual change in MoCA and MDS-UPDRS-III
- Effect
- Highest vs lowest activity tertile: MoCA β 0.47 (0.20–0.74); UPDRS-III β −0.93 (−1.84 to −0.02)
A cohort in Neurology (7 October) followed 294 people with mild-to-moderate Parkinson disease for up to seven years, measuring physical activity by structured interview.
Those in the most active third declined about 0.5 points less per year on the Montreal Cognitive Assessment and about 0.9 points less per year on the motor examination than the least active third. Current activity mattered even after accounting for activity over the previous decade, and total time active mattered more than intensity.
This cannot prove exercise slows the disease — people progressing more slowly may simply be more able to stay active. But exercise has other proven benefits in Parkinson disease, carries little risk, and these data support prescribing it as part of routine care.
- Ask about weekly activity time at each review, not just whether the patient exercises
- Total time active was more strongly linked to slower decline than intensity
- Encourage regular moderate activity the patient can sustain
- Refer to physiotherapy for a structured programme where available
Why it matters
It suggests ongoing activity, not past fitness, is what tracks with slower decline.
Don't overread it
Observational and self-reported — slower disease may enable activity rather than the other way round.
The statistics, in plain English
The motor difference (β −0.93; 95% CI −1.84 to −0.02) only just excludes zero, so the motor association is uncertain; the cognitive one (β 0.47; 0.20 to 0.74) is firmer.
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