Summary: In a 12-week trial in adults with type 2 diabetes, adding cognitive-motor dual-task blindfold training to aerobic and resistance exercise improved cognitive scores significantly more than exercise alone, exceeding the threshold for a clinically meaningful change.
PICO Summary
| Element | Detail |
|---|---|
| Population | 62 adults with type 2 diabetes; single-centre, parallel-group RCT, India. |
| Intervention | Cognitive-motor dual-task blindfold training plus moderate aerobic and resistance exercise, 3×/week for 12 weeks (n=31). |
| Comparison | Aerobic and resistance exercise alone (n=31). |
| Outcome | MoCA rose 3.32 points in the blindfold-training group (25.81 to 29.13; p<0.0001), exceeding the minimal clinically important difference of 2.3, versus 0.94 points in the exercise-only group (25.77 to 26.71; p=0.0006). The adjusted between-group difference was 2.38 points (p=0.0001). |
Blindfold dual-task training in type 2 diabetes
RCT · type 2 diabetes · 12 weeks
Adding blindfold dual-task training to exercise raised MoCA by an adjusted 2.38 points over exercise alone, clearing the minimal clinically important difference. Small single-centre trial with short follow-up.
Expert Commentary
This is an inventive small trial testing whether deliberately increasing cognitive load during exercise, by removing vision and forcing reliance on proprioception and spatial memory, yields greater cognitive gains than exercise alone, and the rationale draws sensibly on the principle that the brain adapts most when challenged beyond its current capacity. The result is internally consistent and the between-group difference cleared the threshold for a clinically meaningful change on the MoCA, which is encouraging in a population where cognitive decline is common and treatment options are few. I would weigh several limitations before generalising. The sample is small at 62 from a single centre, the follow-up is only twelve weeks with no durability data, the MoCA is a screening rather than a definitive cognitive measure and is susceptible to practice effects over repeated administration, and a behavioural intervention cannot be blinded. Safety with blindfolding in older or neuropathic patients also warrants attention given fall risk. Can I use this with my patients? Cautiously and with supervision. For motivated diabetic patients with cognitive concerns, dual-task exercise is a reasonable enrichment of a standard programme, introduced gradually and with visual deprivation added only once balance is secure, while I treat the striking short-term gain as promising rather than established.
References
Anandh Raj J, Patra RC, Kavitha S, et al. The effect of visual deprivation during cognitive motor dual task training on cognitive function in type 2 diabetes mellitus. F1000Res. 2025;14:592. doi:10.12688/f1000research.162466.3