الفهرس 
Effect of whole body vibration training on muscle strength and flexibility in elderly
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Abstract
Background: Sarcopenia, the associated decline in muscle strength that occurs during the normal aging process, contributes to elderly impairment of activities of daily living (ADLs) and overall independence. Previous research suggested resistance (RES) training, and more recently whole-body vibration (WBV) exercise, can help sarcopenia. While WBV exercise is now more prevalent in the literature, there is little known about its potential impact on elderly lower body strength and flexibility. Methods: Forty elderly men from Elmahalla Home Citizen .their age ranged from 60-70 years old, they were assigned into two groups equall in number. group A :( control group) Twenty elderly men participated in normal strengthening and stretching exercises for both quadriceps muscles for 30 minutes once per day twice per week for 8 weeks with (1,2,3)kg sand bags weights and 10 minutes of stretching exercise for knee extensors .group B:(study group) Twenty elderly men participated in a normal strengthening and stretching exercises for 30 minutes once per day twice per week for 8 weeks .with( 1,2,3)kg sand bags weights followed by 5 minutes of whole body vibration training at frequency of (12-20) HZ in a vertical plan). Results: There was a significant effect inside groups (A or B),no significant effect between groups(A and B) for both muscle strength and flexibility as follows: Right Quadriceps force(A)8.84% as percentage of improvement. Right Quadriceps force (B):12.30% as percentage of improvement. left Quadriceps (A): 8.5% as percentage of improvement. Left Quadriceps (B): 12.24% as percentage of improvement of group B. Right Quadriceps flexibility (A): 14.7% as percentage of improvement. Right Quadriceps flexibility (B): 18.3% as percentage of improvement. left Quadriceps flexibility(A): 12.16% as percentage of improvement. left Quadriceps flexibility (B): 16.7% as percentage of improvement. Conclusion: 8 weeks of whole body vibration has no significant effect in increasing muscle force and flexibility for elderly subjects as short term effect