Zusammenfassung
Hintergrund: Zur Erhaltung von Balance und Gleichgewicht verarbeitet die posturale Kontrolle v. a.
visuelle, vestibuläre und propriozeptive Informationen und setzt diese in adäquate
motorische Reaktionen um. Bisher bleibt noch unklar, welchen Einfluss körperliche
Konstitution und Belastung auf Motorik und somit posturale Stabilität haben. Ziel
dieser Studie war daher, mittels computerunterstützter dynamischer Posturografie (CDP)
den Einfluss von Größe, BMI, Geschlecht und akuter körperlicher Ausbelastung auf das
Gleichgewicht zu untersuchen. Probanden und Methoden: 84 Probanden wurden nach standardisierten Fragebogen zu Größe, BMI und sportlicher
Aktivität befragt und dann die posturale Stabilität bestimmt. 17 weitere Probanden
wurden mittels Fahrradergometrie ausbelastet. Nach definiertem Protokoll fand hier
die CDP in Ruhe, bei maximaler Belastung und dann in 5-minütigen Abständen bis zur
Erholung statt. Ergebnisse: Größe, Geschlecht und regelmäßige körperliche Aktivität hatten keinen Einfluss auf
die Balancefähigkeit. Ein deutlicher Effekt konnte hingegen bei akuter körperlicher
Belastung beobachtet werden: Unmittelbar nach Ausbelastung verschlechterte sich die
posturale Stabilität im Vergleich zum Ausgangswert um 44 % (p < 0,017). Bereits 15
Minuten später wurde eine vollständige Erholung beobachtet. Schlussfolgerung: Während Größe und regelmäßiger Freizeitsport nicht die Balancefähigkeit beeinflussen,
führen hoher BMI und akute Ausbelastung zu einer deutlichen Reduktion der posturalen
Stabilität. Die Ergebnisse können daher das ansteigende Verletzungsrisiko nach starker
Beanspruchung gut erklären, insbesondere bei Sportarten, welche ein hohes Maß an Gleichgewichtsvermögen
erfordern.
Abstract
Context and objective: In order for balance to be maintained, the postural control system must process above
all visual, vestibular and proprioceptive information and translate this input into
appropriate motor responses. The influence of bodily constitution and physical activity
on motor responses and thus on postural stability is still unclear. To use computerized
dynamic posturography (CDP) to investigate the influence of body height, body mass
index (BMI), regular sporting activity and acute maximal exercise on balance. Subjects and methods: Eighty-four subjects completed a standardized questionnaire on their height, BMI
and sporting activity. We then assessed the postural stability of the subjects. Seventeen
further subjects performed a maximal exercise test on a bicycle ergometer. We used
CDP and a predefined protocol to assess balance at rest, at maximal exercise and then
at 5-minute intervals until recovery. Results: Body height and regular physical activity did not influence balance ability. By contrast,
BMI and acute physical exercise had a strong effect. Immediately after maximal exercise,
postural stability deteriorated by 44 % compared to the baseline level (p < 0.017).
Complete recovery occurred within only 15 minutes. Conclusions: Whereas body height and regular physical activity do not influence balance performance,
a high BMI value and acute maximal exercise lead to a considerable decrease in postural
stability. Our results can thus explain the increasing risk of injury after strenuous
physical activity, especially in association with sports that require excellent balance.
Schlüsselwörter
posturale Stabilität - Posturografie - BMI - körperliche Belastung - Konstitution
Key words
postural stability - posturography - BMI - physical activity - bodily constitution
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Dr. Hans-Georg Palm
Klinik für Unfallchirurgie und Orthopädie, Bundeswehrkrankenhaus Ulm
Oberer Eselsberg 40
89081 Ulm
Email: hg_palm@yahoo.de