Effects Of Different Low Frequency Whole Body Vibration Training On Lower Limb Motor Function In Children With Spastic Cerebral Palsy

Objective:Cerebral palsy is a group of permanent motor and postural development disorder syndromes,resulting in limited activities.Children with spastic cerebral palsy often have abnormal postures of hip flexion,knee flexion,foot drop,and foot inversion due to spasticity of the lower extremities,which affects the patient.Children’s lower extremity motor function.Exercise therapy is considered to be one of the effective treatments for improving the function of patients with cerebral palsy,and whole-body vibration training,as a method similar to traditional resistance training with lower risk,has a positive effect on the improvement of lower extremity motor function.The vibration frequency is an important factor in determining the intensity of exercise,and the muscle activation effect is proportional to the vibration frequency.But too much training can lead to muscle fatigue,which reduces motor function in children with cerebral palsy.Therefore,this study used low-frequency vibration stimulation at 6Hz,9Hz and 12Hz,and the main purpose was to observe the effect of the superposition of low-frequency whole-body vibration training on the rehabilitation evaluation indicators related to lower limb motor function in children with spastic cerebral palsy,so as to provide a scientific basis for the study of rehabilitation programs for children with cerebral palsy.Theoretical basis.Methods:Thirty-two children with spastic cerebral palsy were selected and randomly divided into control group(n=8),6Hz group(n=8),9Hz group(n=8)and 12Hz group(n=8).The training time was 35 weeks.The control group received two groups of conventional exercise rehabilitation treatment each time without vibration stimulation,and the other three groups were treated with a combination of one group of conventional exercise rehabilitation training and one group of whole-body vibration training programs with corresponding frequencies.The whole body vertical rhythm instrument,model GS100B,was selected in this study,with a frequency of 6-12 Hz and an amplitude of 2 mm.The subjects completed the knee bending standing,squatting and sitting relaxation training on the vibration platform,each group of 3 movements,each movement lasted 2 minutes,and the interval between groups was 1 minute.Before and after training,manual muscle strength test(MMT),modified Ashworth muscle tone rating,Berg balance scale(BBS),timed standing-walking test(TUG)and 10-meter walking time(10MWT)were used to evaluate patients’ muscle strength and muscle tone.,balance function and walking function,and the lower extremity motor function of the subjects was analyzed after statistical processing of the relevant test results.Results:1.After 35 weeks rehabilitation training,the muscle strength of quadriceps femoris and tibialis anterior muscle was significantly improved in all groups(P<0.05),the muscle strength of 12Hz was significantly better than that of control group and other frequency groups(P<0.05),and the muscle strength of triceps calf muscle was not significantly enhanced after training.(P<0.05)2.After training,the muscle tension of knee extensor muscle,hamstring muscle and ankle plantar flexor muscle was significantly decreased in each group(P<0.05),and the effect of reducing muscle tension in 12Hz group was significantly better than that in control group and other frequency groups(P<0.05).3.After training,gross motor function,balance function and walking ability were significantly improved in each group(P<0.05),the improvement effect in 12Hz group was significantly better than that in control group and other frequency groups(P<0.05).Conclusions:When the vibration frequency is at a low level,whole body vibration training has a positive effect on the improvement of lower limb motor function of patients with spastic cerebral palsy,and in a certain range,higher frequency shows more obvious effect.Therefore,the clinical experiment results of this study indicate that low-frequency whole body vibration training can be applied to improve the rehabilitation program of lower limb motor function in patients with spastic cerebral palsy.