Figure 5. Secondary endpoint (fall index). This figure shows the scores obtained in the fall index. The final aggregated results are shown in Table 2. NO – head straight with eyes open; NC – head straight with eyes closed; PO – standing on elastic pads with eyes open; PC – standing on elastic pads with eyes closed; HR – head right with eyes closed; HL – head up with eyes closed; HB – head up with eyes closed; HF – head down with eyes closed; F1 – low frequency; 0.01–0.1 Hz, linked to visual control, typically dominating normal steady and undisturbed posture; ST, stability index); F2–F4 – medium-low frequency: 0.1-0.5 Hz, sensitive to vestibular stress and disturbances; F5–F6 – medium-high frequency: 0.5–1.0 Hz, reflect somatosensory activity in the lower extremities and spine); F7–F8 – high frequency: 1.0 Hz and above, often induced by dysfunctions in the central nervous system; W.D/WDI – weight distribution index as measured for weight distribution over the platforms; SYN L/R – load left/right distribution; SYN TDES HEEL anterior/posterior load distribution.