Isometric thumb radial abduction (extension) (Thumb radial abduction (extension) strengthening isometric, palm down)

Isometric thumb radial abduction (extension) (Thumb radial abduction (extension) strengthening isometric, palm down)

Sit upright in a chair with your forearm and palm flat on the table.
Use your opposite hand to resist your thumb moving out from the index finger, parallel to the table.
Try to hold this position without moving.

Required equipment: Table, Chair
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