Warum Frauen über 40 schweres Krafttraining brauchen – und keine leichten Gewichte
Mit dem Rückgang des Östrogens in der Perimenopause und darüber hinaus schwächen sich die muskelaufbauenden Signale, auf die Frauen einst vertrauten, erheblich ab – und der gängige Ansatz mit leichten Gewichten und hohen Wiederholungszahlen liefert möglicherweise keinen ausreichenden Reiz mehr. Laut Dr. Stacy Sims ist schweres Verbundkrafttraining eines der am besten durch Evidenz gestützten Mittel, um in dieser Lebensphase Muskelqualität, Knochendichte, Stoffwechselgesundheit und kognitive Funktion zu erhalten.
Mit KI erstelltFür viele Frauen dreht sich der Fitnessrat, den sie über Jahrzehnte verinnerlicht haben, um Straffen, Kalorienverbrennen und das Vermeiden von Muskelmasse. Dieses Konzept, so die Sportphysiologin Dr. Stacy Sims, passt schlecht zur physiologischen Realität dessen, was mit Muskeln und Knochen geschieht, wenn der Östrogenspiegel sinkt. Die hormonellen Veränderungen der Perimenopause und Menopause verändern auf grundlegender Ebene, wie Muskeln auf Training reagieren – und wer diesen Wandel versteht, sieht auch, wie ein produktives Training für Frauen in der Lebensmitte und darüber hinaus aussehen sollte.
Mit KI erstelltDer hormonelle Mechanismus: Was Östrogen mit dem Muskel macht
Östrogen ist nicht nur ein Reproduktionshormon. Laut Dr. Sims spielt es eine direkte Rolle dabei, wie sich Muskeln zusammenziehen und erholen. Konkret reguliert Östrogen Myosin, eines der beiden kontraktilen Proteine in Muskelfasern (das andere ist Aktin). Wenn Östrogen schwankt und abnimmt, lässt die Fähigkeit des Myosins, Aktin zu greifen und eine kraftvolle Kontraktion zu erzeugen, nach. Das Ergebnis ist eine Verringerung sowohl der Leistungsabgabe als auch der Muskelqualität, die sich von einfachem Altern unterscheidet.
Dieser Artikel ist als Vorschau veröffentlicht. Der vollständige Text erscheint in der Elyvite-Plattform.
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