Wavelet-based assessment of postural stability in young female volleyball players using a baroresistive platform.

The primary aim of this study was to evaluate the postural stability control mechanisms of young female volleyball players using wavelet analysis. The practical objective of the study was also to validate the signal derived from a baroresistive platform. The study involved 93 young female volleyball players (age: 15 years; height: 174.1 cm; body mass: 62.7 kg) and 30 female university students (age: 20.3 ± 0.6 years; height: 168 ± 3.5 cm; body mass: 61.9 ± 5.4 kg). All participants performed a standard 30-second Romberg test on an instrumented treadmill (Noraxon FDM-T) under both eyes-open and eyes-closed conditions. A time-frequency analysis of the treadmill signal was conducted using the Morse wavelet. The obtained results revealed several aspects of postural stability control in young volleyball players that may be the consequence of long-term athletic training. The treadmill signal demonstrated discriminative properties within the frequency ranges associated with visual and vestibular control.