Energy balance
Body Mass Index (BMI) partially mediates the protective effect of physical activity on diabetic retinopathy, accounting for 35.7% to 58.7% of the total benefit, indicating that weight loss is a significant but not exclusive mechanism.
Exercise protects your eyes through two main paths: helping you lose weight (which accounts for about half the benefit) and improving your metabolism directly (the other half). Even if you struggle to lose weight, staying active still provides significant protection against diabetic eye disease through improved blood sugar and reduced inflammation.
35.7% and 58.7% of the associations between MPA, MVPA, and the full spectrum DR were mediated by lower BMI, respectively.
Why this rating
Mediation analysis using nonparametric bootstrap with 1,000 iterations on a large cohort.
Source
Association of wearable device-measured physical activity with full-course diabetic retinopathy and retinal traits: insights from the middle-aged and older adult cohort
Chenxiao Shen et al. · Diabetology & Metabolic Syndrome · 2025
DOI 10.1186/s13098-025-01745-1
More from this paper
- Moderate-to-vigorous physical activity (MVPA) performed during morning hours (06:00–12:00) significantly reduces the risk of developing diabetic retinopathy (DR) and slows retinal thinning, whereas late-night physical activity increases DR risk.Good
- Higher levels of moderate and moderate-vigorous physical activity are associated with accelerated thickening rates of the ganglion cell-inner plexiform layer (GCIPL) and macular thickness (MT) across the full course of diabetic retinopathy, suggesting a neuroprotective structural benefit.Good
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