Instruction：Sit down and point your toes upward. Hold it for 5 seconds. Point your toes downward and hold it for 5 seconds. Repeat it 20 times.
Massage calf muscle for 5 minutes daily before sleep
a. Avoid standing up for too long
b. Avoid sitting down with both legs crossed
c. Recommend to use foot pedal when sitting down (figure 1)
d. When sleeping on your side, it is recommended to put a pillow between both legs and a small pillow beneath your belly to support it