Key result
A 14-day dietary intervention is linked to ~5% less rapid glucose variability in healthy young women.
Why the study?
Continuous glucose monitoring interpretation in individuals without diabetes is expanding beyond general glycemic control toward dynamic metrics such as rate of change.
Do short-term dietary or physical activity interventions improve CGM-derived glucose rate-of-change metrics in healthy adult females?
Do short-term dietary or physical activity interventions improve CGM-derived glucose rate-of-change metrics in healthy adult females?
Answers are grounded in this paper and cite their sources.
Short-term dietary modifications, but not physical activity, significantly reduce glucose rate-of-change fluctuations in healthy normoglycemic women.
Continuous glucose monitoring (CGM) interpretation in people without diabetes is expanding beyond general glycemic control toward more dynamic metrics, such as Rate of Change (RoC). In this fixed-sequence pilot study conducted in 30 healthy adult females, we evaluated associations between two structured 14-day lifestyle interventions and free-living conditions using standard CGM-derived glycemic variability metrics and a novel framework based on the rate-of-change (RoC) metrics and data clarity using an unblinded Abbott FreeStyle Libre 2 monitoring. The dietary intervention (calorie-tailored low-glycemic index regular meals) were associated with lower time spent in rising (+1 to +2 mg/dL/min) and falling (−2 to −1 mg/dL/min) RoC bins by 4.76 ± 1.87% (complete-case delta, p ≤ 0.0071), whereas the 14-day physical activity intervention showed smaller and less consistent RoC changes (0.41 ± 2.20, p ≥ 0.3549). These findings, despite some major study design limitations, suggest that RoC may be more responsive and sensitive to short-term dietary pattern modifications in normoglycemic women.
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Lejk et al. (2026) studied Healthy (n=30). Dietary intervention (calorie-tailored low-glycemic index regular meals) vs. Free-living conditions and physical activity intervention was evaluated on Time spent in rising (+1 to +2 mg/dL/min) and falling (−2 to −1 mg/dL/min) glucose rate-of-change (RoC) bins (delta 4.76 ± 1.87%, p=≤ 0.0071). A 14-day dietary intervention of calorie-tailored low-glycemic index meals reduced time spent in rising and falling glucose rate-of-change bins by 4.76% (p ≤ 0.0071) in healthy young women.
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