## 4 Results and Discussion
### WBVE and Neurological Manifestations  
It is pointed out that, as the COVID-19 pandemic progresses, reports of neurological manifestations are increasing. These manifestations can be considered as direct effects of the virus on the nervous system, para-infectious or post-infectious immune-mediated disease, and neurological complications of the systemic effects of COVID-19 [67]. The effects of WBV exercise on neurological manifestations have been evaluated in some different populations. The studies assessing the effects of WBV on neurological manifestations were those by [PERSON] et al., 2015 [68]; [PERSON] et al., 2006 [69]; and [PERSON] et al., 2014 [70]. In general, the sample consisted of 82 individuals of both sexes. All studies used different VP models. Regarding the studied population, a difference was observed among the studies, being individuals with effusion in the study by [PERSON], patients suffering with spastic digilegia in the study of [PERSON] et al., 2006 [69] and with cerebellar pin ataxia in the study of [PERSON] et al. [70]. The frequency used in the studies ranged from 6 to 40 Hz (Table 3).  
For [PERSON] et al., 2015 [68], the main effect of intensity was significant. It was investigated a protocol with a complete set of eight static exercises was repeated three times, the duration of the rest period between the different exercises was set at 1-min, and the control group receiving the same procedures, with the vibration machine off. Exposure to the low-intensity and high intensity protocols led to a significantly greater increase in normalized biceps femoris and tibialis anterior electromyography (EMG) magnitude in both legs compared with no WBV. The intensity \(\times\) exercise interaction was also significant, suggesting that the WBV-induced increase in EMG activity was exercise-dependent. The EMG responses to WBV were similar between the paretic and non-paretic legs and were not associated with level of lower extremity motor impairment and spasticity.  
[PERSON] et al., 2006 [55] found that the spasticity decreased in knee extensors in the WBV group. Muscle strength increased in the resistance training group at the velocity 308/s and in both groups at 908/s. Six-Minute Walk Test and Timed Up and Go test did not change significantly. Gross Motor Function Measure increased in the WBV group. These data suggest that an 8-week intervention of whole-body vibration training or resistance training can increase muscle strength, without negative effect on spasticity, in adults with cerebral palsy. The protocol consisted in WBV group exercised three times weekly over eight weeks. In each session was performed 5 min warming up, approximately 6 min of WBV training (rest included) and finished with a short program of muscle stretching. The RT group exercised three times weekly over eight weeks. Each session consisted of the same type of warming up and stretching, but instead of WBV training this group performed RT in a leg press device. Three sets of 10-15 repetitions were performed with 2 min of rest.  
[PERSON] et al., 2014 [70] identified that WBV as a supplementation to active physiotherapy, in a protocol with four series of SRT on four different days. Furthermore, the use of stochastic whole-body training before active physiotherapy might have an even larger effect than both treatments applied independently.