Feedforward-Aktivität des M. transversus abdominis und M. multifidus bei Vorfuß- versus Rückfußkontaktlaufmuster

Zusammenfassung

Aus verschiedenen Gründen läuft eine beträchtliche Anzahl von Läufern bei geringer und moderater Geschwindigkeit mit einem Vorfußkontaktlaufmuster, obwohl die menschliche Ferse beim Walken und langsamen Laufen anatomisch für die Fersenlandung „designt” zu sein scheint.

Die vorliegende Ex-post-facto-Forschungsarbeit untersuchte die bilaterale Aktivität von M. transversus abdominis und M. multifidus, um Hinweise auf die Rumpfstabilität beim Rückfuß- versus Vorfußkontaktlaufmuster zu finden.

Bei 12 weiblichen Freizeitläufern (je 6 Vorfuß- und Rückfußkontaktläufer) mit gleichem Gewicht, Größe, Alter und Lauferfahrung wurden während Laufbandjoggen mit definierten Geschwindigkeiten bilaterale oberflächliche EMG-Daten des M. transversus abdominis und M. multifidus gesammelt. Außerdem wurden die IEMG-Werte zwischen Muskeleinsatz und initialem Kontakt (Feedforward) quantifiziert. Das Rechts-/Links-Verhältnis dieser Werte wurde berechnet und analysiert.

Laut der aktuellen Literatur wird empfohlen, bei geringen und moderaten Geschwindigkeiten mit einem Rückfußkontaktmuster zu laufen. Die in der vorliegenden Studie festgestellte symmetrischere Aktivierung des M. transversus abdominis könnte auf eine bessere Rumpfstabilität beim Rückfußkontaktlaufmuster bei den untersuchten Geschwindigkeiten hindeuten.

Abstract

For several reasons a considerable percentage of runners run at low and moderated speeds in a forefoot strike running pattern although the human heel seems to be anatomically ”designed” for heel landing in walking and low speed running.

This ex post facto research examined bilateral activity of the transversus abdominis and multifidus in order to find indications concerning core stability in a rear foot versus a forefoot strike running pattern.

In 12 female recreational runners (6 forefoot and rear foot strikers each) with equal weight, height, age and running experience bilateral surface EMG data from the transversus abdominis muscle and multifidus were collected during treadmill running at a predefined running speed time. In addition, IEMG values were quantified between muscle onset and initial contact (feed forward). The left to right proportions of these values were estimated and analysed.

Current literature indicates that it is advisable to adapt a rear foot strike running pattern at low and moderate speeds. This study found more symmetrical activation of the transversus abdominis muscle in the rear foot strike group which might indicate a better core stability for the investigated speeds.

Schlüsselwörter

Laufen - Laufmuster - M. transversus abdominis - M. multifidus - Muskelaktivität

Key words

running - running pattern - transversus abdominis muscle - multifidus muscle - muscle activity

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