Purpose The purpose of this study was to verify the effectiveness of eccentric stretching exercise with weight bearing compared with self-stretching exercise on ankle joint ROM, calf muscle strength and investigate effect of angular velocity for gastrocnemius and soleus muscle. Methods 30 female who were 20’s were participated this study. We randomized divided subjects into three groups, self-stretching exercise group(SSE), slow eccentric stretching with weight-bearing exercise group(SEC), fast eccentric stretching with weight bearing exercise group(FEC). SSE group performed ankle dorsi and plantar flexion in the long sitting position themselves. SEC group and FEC group performed ankle dorsi and plantar flexion in standing position on edge of stair with arm support. Participants performed 10 minutes a day and five times with resting time between sets a week for three weeks. Data was collected pre and post measurement of range of motion and strength with 60˚/sec using by the Bio-Dex. We performed paired t-test and ANCOVA using by SPSS statistical program. Results The results of this study was that all of three groups showed significantly increasing of R.O.M. SEC, FEC group showed significantly increasing of plantar flexion strength, all of three group showed no significantly increasing of dorsiflexion strength. There was no significantly difference among three groups. Conclusion We suggest that

SEC, FEC was more effective method increasing of R.O.M and strengthening of plantar flexor. For the increasing ankle range of motion, we recommend SEC as well the enhancement of strength and R.O.M more easily in home or hospital.