## 3 Results
### Fat-Free Body Parameters
The baseline group was sacrificed at initiation of the study for analysis of body composition, bone mass, and muscle function. For vibration treatment, animals in the vibration group were placed in vibration platform. This group received 30 min of whole-body vibration each day, 5 days per week, for 12 weeks. The non-vibration animals remained in their cages. Studies resulted in significant body composition differences between the vibration and control groups. The whole-body vibration group weighed less, had less body fat, and had a lower overall PBF than the age-matched non-vibration group. In addition, the vibrated rats had lower serum leptin levels than the control animals. However, differences in food intake were not observed between the two groups [15]. [PERSON] et al. [16] conducted a study involving 36 healthy, non-obese young women. They performed the whole-body vibration procedure over 8 weeks, twice a week. WBVT caused a reduction in women's total body FM and an increase in women's SLM. As in this study, women's body mass and BMI values did not change significantly. In a study performed by [PERSON] et al. [17], a six-week gymnastic exercise combined with whole-body vibration (WBV 25-50 Hz) resulted in greater improvements in human body composition than exercise alone. There was no improvement in the untrained control group of participants. [PERSON] et al. [18] measured and compared energy expenditure in men when performing half squats with and without WBV. It was found that an 11.5 minute series of exercises among participants (five sets of 10 repetitions with a 2-minute recovery interval between sets), along with vertical sinusoidal vibrations of 30 Hz frequency and 4 mm amplitude, increased energy expenditure during both exercise and recovery, compared to the same series of exercises with no vibrations among participants. Heart rate did not differ significantly between groups of participants. The authors summarized the results as showing that it would be feasible to introduce vibration exercises into regular training programs, particularly those whose key objective is muscle hypertrophy along with fat reduction [18]. These were sinusoidal vibrations; in our study a greater impact on the women's metabolism of stochastic vibrations was assumed, through a higher threshold of neuromuscular excitability, as in the study by [PERSON] et al. [19], where it was proved that human muscular activity and energy expenditure rose during verum SR-WBV compared to baseline and sham SR-WBV. Most recent studies have focused on assessing the effects of WBVT on human body composition in overweight or obese people. [PERSON] et al. [20] found small effects of WBV on total FM per kg among the adult general population of people who had normal BMI. The general results of the systematic review and meta-analysis by [PERSON] et al. [21] showed a positive effect of WBV on FM among healthy adults who are overweight or obese at baseline, especially when added to other conventional weight loss interventions such as diet and exercise. [PERSON] et al. [22] reported a significant decrease in the PBF after 8 weeks of exercise with WBV among obese people, while no changes were observed in both the Exercise and Control groups of participants. [PERSON] et al. [23] studied Hispanic postmenopausal obese women and showed that 6 weeks of WBV decreased the women's PBF compared to both the baseline and control groups. Also noteworthy is a study from 2023 [6] that assessed the impact of WBV on the human level of irisin, as well as the level of oxidative stress markers and body composition among participants. It was found that the WBV procedure three times a week for 6 weeks was sufficient to produce results at the human metabolic level, as demonstrated by the increase in irisin among participants, which is an anti-obesity and anti-diabetes factor, and the reduction in oxidative stress markers and visceral adipose tissue, which are more metabolically active and more insulin-resistant. In contrast to the previous study, [PERSON] et al.