Sit on a cushion, hold the dumbbell to shoulder level the palm of the hand facing to the front (Figure 1)
exert lift dam เบลขึ้น. Stop at the elbow are locked to shoulder muscles working hard. (elbow bend slightly only, do not bend.) (Figure 2)
.Gradually relaxing dumbbell down slowly until the dam blur in the ear level is 1 times raised until the regulation.
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