The purpose of this study was to investigate the effects of vibration on Golgi tendon organ(GTO) and Hold-Relax of PNF in muscular activity and gait factors on Delayed Onset Muscle Soreness(DOMS). This study was conducted on 20 subjects. they were divided into two groups; Hold-Relax of PNF(n=10), Vibration on GTO(n=10). Both of the group was performed interventions 1 times a day for 3 days. The data was analyzed by the repeated-ANOVA for comparing before, after 24h and after 48h changes of factors in each group and the Independent t-test for comparing the between groups. The results are as follows. There was statistically significant difference of before, after 24h and after 48h vibration on GTO group and Hold-Relax of PNF group in muscular activity and gait factors on DOMS.(p<0.05). There was no statistically significant difference of between vibration on GTO group, but there was statistically significant difference Hold-Relax of PNF group in EMG, step width, step length, stride length(p>0.05). As a results of this study, Hold-Relax of PNF group are effective in improving muscular activity and gait factors

INTRODUCTION
 METHODS
  Subjects
  Measurement Tools and Measuring Methods
  Data Analysis
 RESULTS
  The Change of Vastus Medialis Activity accordingto Period
  The Changes of Vastus Lateralis Activity accordingto Period
  The Change of Rectus Femoris Activity accordingto Period
  The Change of Step Width according to Period
  The Change of Step Length according to Period
  The Change of Stride Length according to Period
 DISCUSSION
 CONCLUSION
 REFERENCES

• Hyun ju Jun(Cheongam College, Suncheon, Korea)
• Hoe Song Yang(Cheongam College, Suncheon, Korea)
• Young Dae Yoo(Cheongam College, Suncheon, Korea)
• So Hui Park(Cheongam College, Suncheon, Korea)
• So Hui Park(Cheongam College, Suncheon, Korea)
• Hyuk Jegal(Cheongam College, Suncheon, Korea)
• Chan Joo Jeong(Cheongam College, Suncheon, Korea) correspondence