[Purpose] The purpose of this study was to examine correlations between measurement time and different expansibility of the elastic tape on the rectus femoris and body sway index with plyometric exercise. [Subjects and Methods] The subjects of this study were 24 healthy men. C90 area, C90 angle, trace length, sway average velocity for body sway index were measured using a force plate by BT4. Th...

Two different balance testing methods were compared: (1) measurement of spontaneous postural sway during quiet standing, and (2) measurement of induced postural sway in response to an applied postural perturbation. Eyes-open tests were performed in 64 healthy young and elderly adults and in five elderly subjects with a history of falling. In both balance tests, the sway was defined in terms of ...

OBJECTIVES To determine whether a series of voluntary postural sway tasks could differentiate and accurately identify the falls-history status of older adults, and to examine the relations between voluntary sway measures and falls risk. DESIGN Case-control study. SETTING University biomechanics laboratory. PARTICIPANTS Healthy community-dwelling older adults (N=51) aged 65 to 94 years who...

An essential consideration in the development of any control algorithm for a multilegged vehicle is to maintain stability. If at any point during locomotion the vehicle becomes unstable, there is a possibility that the vehicle will overturn. In this research, we propose to include body sway motion into the motion planning of a quadruped’s wave gait, such that its stability margin can be substan...

OBJECTIVES The following study analyses the influence of risk factors among the occupational group of truck drivers on postural control and body mass index (BMI). DESIGN Observational study. SETTING One motorway station close to several highways in Germany. PARTICIPANTS 180 truck drivers (177 male/3 female), aged 21-65 years old, took part in this study. OUTCOME MEASURES Postural contro...

Resonant response of water waves in a narrow gap, the so-called gap resonance, is hydrodynamic phenomenon with practical applications. When coupled to body motions, physics becomes rather complicated, involving fluid resonance and damping that determines amplitude. Gap resonances between two identical elongated bodies, one held fixed other floating, are investigated experimentally for unidirect...

BACKGROUND Motion sickness is characterized by subjective symptoms that include dizziness and nausea. Studies have shown that subjective symptoms of motion sickness are preceded by differences in standing body sway between those who experience the symptoms and those who are not. Boxers often report dizziness and nausea immediately after bouts. We predicted that pre-bout standing body sway would...

We used multivariate kinematics and joint torque measurements during dynamic posturography to determine the relative contributions of changes in overall control gain, relative weighting of sensors, and noise-like effects on posture control in the elderly. Our results show that sway coordination and amplitude both change with age, but that changes in overall feedback gains do not explain these d...

This study shows that center-of-pressure (COP) traces that closely resemble physiologically measured COP functions can be produced by an appropriate selection of model parameters in a simple feedback model of the human postural control system. Variations in the values of stiffness, damping, time delay, and noise level determine the values of 15 sway measures commonly used to characterize sponta...