What is thumb flexion and extension?

Thumb Flexion and Extension

Thumb flexion/extension

Picture of thumb flexion/extension exercise
  1. Place your forearm and hand on a table with your thumb pointing up.
  2. Bend your thumb downward and across your palm so that your thumb touches the base of your little finger. Hold that position for about 6 seconds. Then straighten your thumb.
  3. Repeat 8 to 12 times.
  4. Switch hands, and repeat steps 1 through 3.

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