## 3 Results
### Studies Characteristics  
The nine selected studies were systematized by authors, year of publication, country, participants, age, body mass index (BMI), aim, vibrating device, exposure variable, intervention time, and the tools used to assess the functional capacity. The SVT results are summarized in Table 2, while the LVT results are summarized in Table 3.  
All the nine selected papers were published between 2012 and 2023, and 40% of the studies were conducted in Europe (Italy, two studies; Poland, one study; Denmark, one study), 30% North (USA, one study) and South America (Brazil, two studies) and 30% in Asia (Iran, two studies; China, one study). The selected studies included a total of 352 individuals (78.15% female) aged between 46 and 80 years, with BMIs between 18 and 44 kg/m\({}^{2}\), including people who had a diagnosis of unilateral or bilateral KOA and that underwent SVT or LVT. In the SVT publications, the age of the individuals ranged from 47 [31] to 75 [34] years, and BMI varied from 23 [31] to 44 kg/m\({}^{2}\)[34], with a total of 226 individuals, of whom 179 were female. Considering the source of mechanical stimulation, the devices used varied, with 40% of studies employing the Novaplate(r) Fitness Evolution (Novaplate, Sao Paulo, Brazil) (two studies) [34; 39]; 20% using Xendon(r) platform VibM (VibM, Xendon, Sweden) (one study) [31]; and 20% using Fitybe(r) Gymna Uniphy (Bilzen, Belgium) (one study) [40]; i-vib5050(r) Sport Platform (China) (one study) [41]. The types of VP also differed: sidetermating displacement was used in studies by [PERSON] et al. (2009) [31], [PERSON] et al. (2020) [34], and [PERSON] et al. (2020) [39], while vertical displacement was used by [PERSON] et al. (2017) [40] and [PERSON] et al. (2021) [41]. Furthermore, 80% of the studies (four records) established a study design with cumulative exposure, ranging from 4 to 8 weeks, with sessions varying from 2 to 3 days per week [31; 39; 40; 41]. Training protocols varied widely, with the number of bouts per training session ranging from three [34] to fifteen [41] bouts, and the duration of time per day ranged from 5.5 [31] to 39 min [39]. In contrast, 20% of studies (one record) tested an acute protocol of one session in one day lasting 11 min [39]. Participants performed these protocols either barefoot [31; 34; 39; 41] or wearing shoes [31] and in varying positions, from a semi-squatted position (knee angle from 30 to 60 degrees) [39; 41] to sitting on a chair facing the VP, with the arms extended over the knees (knee angle from 100 to 120 degrees) [34; 39]. Similarly, in LVT studies, the age of the individuals ranged from 46 [13] to 80 [14] years, and the BMI varied from 18 [33] to 36 km/m\({}^{2}\)[32], with 126 individuals, of whom 96 were female. The vibration devices varied, with 25% using vibratory unloader knee orthosis (one study) [33], 25% using RAM Vitberg(r) Base Module and Vitberg(r) Knee Module (Vitberg, Poland) (one study) [32], and 25% a pneumatic vibrator powered by compressed air (Bologna, Italy) (one study) [13], while Cro(r)System (NEMOCO srl, Roma, Italy), was used in the remaining 25% (one study) [14]. Moreover, 75% of studies (three records) [13; 32; 33] employed cumulative exposure protocols (ranging from 2 to 6 weeks), with sessions varying to 5 h per week to 5 days/week. The number of bouts per session was one [13], with session durations ranging from 20 to 60 min [32]. One study does not report the number of bouts used but reported a time work per week of 300 min [33]. In contrast, 25% of the studies (one study) [14] employed acute protocol of three bouts over three consecutive days and session durations of 10 min. Notably, only one study [14] reported the rest time used between sessions (1 min). In relation to the muscles that received MV, the most reported were the _vastus lateralis_[13; 14; 33], _vastus medialis_, and _rectus femoris_ muscles [13; 14]. Figure 1: Flowchart of study selection process based on PRISMA guidelines.