Effects Of Different Frequencies Of Whole Body Vibration Stimulation On Balance Ability And Lower Limb Proprioception After Motor Fatigue

Objective:This article compares the differences in balance ability and lower limb proprioception between before and after exercise fatigue and before and after whole body vibration stimulation through exercise fatigue experiments and vibration stimulation experiments.It explores the effect of whole body vibration stimulation on exercise fatigue and compares the differences in balance ability and lower limb proprioception changes after intervention through different frequencies of whole body vibration stimulation.It also explores the relationship between different frequencies of whole body vibration stimulation and exercise fatigue The relationship between balance ability and lower limb proprioception.Methods:This experiment recruited 12 healthy young men as participants,and each participant was required to complete 5 experiments,including 1 exercise fatigue experiment and 4 post fatigue vibration experiments with different frequencies.Determine a single experiment plan by drawing lots before the experiment.After warm-up,the first step is to measure the front side of the index,and then implement the exercise fatigue plan.Immediately after reaching the fatigue state,conduct post test or vibration intervention for exercise fatigue test indicators.The vibration intervention was performed using whole-body vibration stimuli of different frequencies,namely 0Hz(control group),10Hz,20Hz,and 30Hz,respectively.After the stimulation,the indicators of the post fatigue vibration experiment were measured.The exercise fatigue plan of this experiment adopts the running fatigue plan,and requires a minimum interval of 72 hours between each experiment.The dynamic and static balance ability indicators and lower limb proprioception indicators were measured using the Pro-kin balance tester.The static balance assessment module,unstable plane balance assessment module,and multi axis proprioception assessment module were used to evaluate static balance,dynamic balance,and proprioception function,respectively.The research results conform to normal distribution,and the data are expressed in mean ± standard deviation.The inter group comparison of the measured indicators before and after fatigue was conducted using one-way analysis of variance.The intra group comparison before and after fatigue was conducted using paired t-tests.The intra group comparison before and after whole body vibration stimulation(WBV)was conducted using paired t-tests.The inter group comparison after different frequencies of WBV was conducted using one-way analysis of variance.Results:(1)Before fatigue,it was found that there was no significant difference in the static balance ability,dynamic balance ability,and lower limb proprioception indicators among the subjects(P>0.05).(2)Compared with before and after fatigue,it was found that the subjects’ static balance ability,dynamic balance ability,and lower limb proprioception indicators showed a significant increase after fatigue(P<0.05).(3)Compared with before and after WBV,it was found that there was no significant decrease in the static balance ability,dynamic balance ability,and lower limb proprioception indicators of the control group after WBV compared to before WBV(P>0.05).The static balance ability,dynamic balance ability,and lower limb proprioception of the other three vibration groups after WBV were lower than before WBV.Among them,in the 10Hz group,except for the no significant decrease in the standard deviation of the anterior and posterior directions and the standard deviation of the left and right directions in the closed eye state(P>0.05),all other indicators were significantly reduced(P<0.05).All indicators in the 20Hz group were significantly reduced(P<0.05).The 30Hz group showed no significant decrease in all other indicators except for the standard deviation in the front and back directions and the length of movement in the open eye state,and the standard deviation in the left and right directions in the closed eye state(P>0.05).(4)The inter group comparison after WBV showed significant differences(P<0.05)in the static balance ability,dynamic balance ability,and lower limb proprioception indicators of the subjects,with the 20Hz group having the lowest indicators,indicating that the 20Hz WBV had the best relief effect on exercise induced fatigue.Conclusions:(1)After sports fatigue,there is a significant increase in various indicators of dynamic and static balance ability,indicating that sports fatigue can lead to a decrease in balance ability.(2)Compared to the control group,the dynamic and static balance ability of the stimulation group rebounded after stimulation,indicating that whole-body vibration stimulation has a certain alleviating effect on the decrease of balance ability caused by exercise fatigue.(3)Through inter group comparison,it was found that the effect of moderate frequency WBV on alleviating fatigue was superior to other frequencies.Therefore,it is recommended to use a moderate frequency WBV for the relief of sports fatigue.(4)The overall trend of research on lower limb proprioception is consistent with the results of research on dynamic and static balance ability,indicating that changes in proprioception may be an intermediate factor in alleviating exercise fatigue and improving lower limb balance ability through whole-body vibration stimulation.