|Abstract||Context: 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. It is still unclear which factores affect the computerized dynamic posturography (CDP).
Objective: To investigate the realiability of the CDP by use of the Biodex Balance Systems, with a special attention of age, body height, body mass index (BMI), gender, one leg stance, visual and auditory input, stability level, regular sporting activity and acute maximal exercise on balance.
Setting: Military tertiary care teaching hospital.
Subjects and methods: 110 subjects completed a standardized questionnaire on their age, gender height, BMI and sporting activity. We then assessed the postural stability of the subjects. Additionally 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, gender, one leg stance, auditory inputs and regular physical activity did not influence balance ability. By contrast, age, stability level, visual feed back, BMI and acute physical exercise had a strong effect.
Conclusions: A high BMI value, age, stability level 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 sporting activities with changing requirements of balance, e.g. skiing. Furthermore we can say that the CDP is a highly reliable method to examine postural stability, if attention is payed to several influencing factors, especially BMI and age.||dc.description.abstract