Summary
Type 2 diabetic patients have an increased level of systemic free radicals, which severely restrict the bioavailability of endothelium-derived nitric oxide (NO) and thus contribute to the development of an endothelial dysfunction. This review analyses the influence of physical training on molecular development mechanisms of the endothelial dysfunction and determines the significance of regular physical exercise for the endothelial function in type 2 diabetic patients. Systematic training reinforces the endogenic antioxidative capacity and results in a reduction in oxidative stress. Training – also combined with a change in diet – furthermore reduces hyperglycaemic blood sugar levels, thus curbing a major source of free radicals in diabetes. Moreover, physical exercise enhances vascular NO synthesis through an increased availability/activity of endothelial NO synthases (eNOS). Endurance, as well as resistance training with submaximal intensity or a combination of both forms of training is suitable to effectively improve the endothelial function in type 2 diabetic patients in the long term.
Zusammenfassung
Typ-2-Diabetiker weisen eine erhöhte Konzentration systemischer freier Radikale auf, welche die Bioverfügbarkeit von Stickstoffmonoxid (NO) im Endothel stark einschränken und damit zur Entstehung einer endothelialen Dysfunktion beitragen. Diese Übersichtsarbeit analysiert den Einfluss von körperlichem Training auf molekulare Entstehungsmechanismen der endothelialen Dysfunktion und eruiert die Bedeutung von regelmäßiger sportlicher Aktivität für die Endothelfunktion bei Typ-2-Diabetikern. Systematisches Training verstärkt die endogene antioxidative Kapazität und bewirkt eine Abnahme von oxidativem Stress. Sportliche Aktivität – auch in Kombination mit einer Ernährungsumstellung – verringert außerdem hyperglykämische Blutzuckerspiegel, wodurch eine Hauptquelle freier Radikale beim Diabetes eingedämmt wird. Zudem steigert körperliches Training die vaskuläre NO-Synthese durch eine erhöhte Verfügbarkeit/Aktivität der endothelialen NO-Synthasen (eNOS). Ein Ausdauer- als auch ein Krafttraining mit submaximalen Intensitäten oder eine Kombination beider Trainingsformen eignet sich langfristig, die Endothelfunktion bei Typ-2-Diabetikern wirksam zu verbessern.
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Ein Erratum zu diesem Beitrag ist unter http://dx.doi.org/10.1007/s10354-011-0036-1 zu finden.
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Brinkmann, C., Schwinger, R. & Brixius, K. Körperliche Aktivität und endotheliale Dysfunktion bei Typ-2-Diabetikern: über die Rolle von Stickstoffmonoxid und oxidativem Stress. Wien Med Wochenschr 161, 305–314 (2011). https://doi.org/10.1007/s10354-011-0868-8
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DOI: https://doi.org/10.1007/s10354-011-0868-8