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Effects of exercise, metformin and their combination on glucose metabolism in individuals with abnormal glycaemic control: a systematic review and network meta-analysis

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Resumen del artículo

Título de Paperzilla
Exercise vs. Metformin for Blood Sugar Control: A Network Meta-Analysis Showdown!

This network meta-analysis found that metformin was more effective than exercise for glucose control in type 2 diabetes, while exercise appeared more effective in prediabetes. Combined exercise and metformin may be more effective than either alone, particularly in type 2 diabetes, but more research is needed. The findings are limited by substantial heterogeneity across studies, variations in control conditions, and a limited number of studies examining combination therapy.

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Exercise and metformin can help control blood sugar, but exercise might be better for pre-diabetes, while metformin is better for type 2 diabetes.

Posibles conflictos de intereses

This study was funded by the Chinese Scholarship Council. No other conflicts were declared.

Limitaciones identificadas

Heterogeneous control conditions and blinding issues
The control conditions varied across studies, which could bias the results. Blinding is also an issue since participants know if they are exercising but may not know if they are taking metformin.
Over-reliance on per-protocol analysis
Most studies (81%) used per-protocol analysis, which can overestimate the treatment effects since it excludes participants who didn't adhere to the assigned intervention.
Small number of studies examining combination treatment
Only five studies examined the combination of exercise and metformin, limiting conclusions about the interactive effects.
High heterogeneity
Confidence in the findings is limited due to high heterogeneity (variability) in the results across studies. While subgroup analyses and meta-regressions explored some sources, substantial unexplained heterogeneity remains.
Publication and small-study bias
Publication bias and small-study bias were detected for some outcomes, meaning the available evidence may be skewed towards positive results.

Explicación de la calificación

This is a well-conducted network meta-analysis that synthesizes a large body of evidence on an important topic. The methodology is generally strong, but the limitations related to heterogeneity, control conditions, and the small number of studies on combination therapy prevent a higher rating.

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Jerarquía temática

Campo: Medicina

Información del archivo

Título original: Effects of exercise, metformin and their combination on glucose metabolism in individuals with abnormal glycaemic control: a systematic review and network meta-analysis
Subido: 13 ago 2025, 18:13:55
Privacidad: Público