Heat therapy shows benefit in patients with type 2 diabetes mellitus : a systematic review and meta-analysis

Sebők, Judit and Édel, Zsófia and Váncsa, Szilárd and Borbásné Farkas, Kornélia and Kiss, Szabolcs and Erőss, Bálint Mihály and Török, Zsolt and Balogh, Gábor and Balogi, Zsolt and Wittmann, István and Vigh, László and Dembrovszky, Fanni and Hegyi, Péter (2021) Heat therapy shows benefit in patients with type 2 diabetes mellitus : a systematic review and meta-analysis. INTERNATIONAL JOURNAL OF HYPERTHERMIA, 38 (1). pp. 1650-1659. ISSN 0265-6736

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Abstract

Type-2 diabetes mellitus (T2DM) is a common health condition which prevalence increases with age. Besides lifestyle modifications, passive heating could be a promising intervention to improve glycemic control. This study aimed to assess the efficacy of passive heat therapy on glycemic and cardiovascular parameters, and body weight among patients with T2DM.A systematic review and meta-analysis were reported according to PRISMA Statement. We conducted a systematic search in three databases (MEDLINE, Embase, CENTRAL) from inception to 19 August 2021. We included interventional studies reporting on T2DM patients treated with heat therapy. The main outcomes were the changes in pre-and post-treatment cardiometabolic parameters (fasting plasma glucose, glycated plasma hemoglobin, and triglyceride). For these continuous variables, weighted mean differences (WMD) with 95% confidence intervals (CIs) were calculated. Study protocol number: CRD42020221500.Five studies were included in the qualitative and quantitative synthesis, respectively. The results showed a not significant difference in the hemoglobin A1c [WMD -0.549%, 95% CI (-1.262, 0.164), p = 0.131], fasting glucose [WMD -0.290 mmol/l, 95% CI (-0.903, 0.324), p = 0.355]. Triglyceride [WMD 0.035 mmol/l, 95% CI (-0.130, 0.200), p = 0.677] levels were comparable regarding the pre-, and post intervention values.Passive heating can be beneficial for patients with T2DM since the slight improvement in certain cardiometabolic parameters support that. However, further randomized controlled trials with longer intervention and follow-up periods are needed to confirm the beneficial effect of passive heat therapy.

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