Forearms, wrists and hands
A palm can turn without the wrist bending. A wrist can bend without the forearm turning.
Distinguish forearm rotation from bending at the wrist.
With the elbow bent and upper arm still, supination turns the palm up and pronation turns it down. Wrist flexion brings the palm toward the forearm; wrist extension brings the back of the hand toward it.
A forward shift in Plank brings the wrist into more extension. The app shows that relationship without teaching a universal safe load or a required depth.
Turning the forearm, bending the wrist
These movements happen in different relationships.
This is a simplified learning diagram. It is not a reviewed anatomical illustration.
Plank Pose
Lock one modeled motion while exploring the other. Compare a free forearm demonstration with the hand-on-mat reference.
Rest your forearm on your thigh, palm down. Turn the palm up without moving your elbow, then bend the wrist.
Notice: Turning the forearm and bending the wrist happen at different places.
This is noticing, not instruction. Move as little as you like, stop at any point, and watching instead of moving is a complete way to take part.
Turning the palm up with the elbow bent is which forearm movement?
Pause before opening Practice. Say the distinction in your own words.
Which two body parts are moving relative to each other?
The task is observation, not a wrist-loading challenge. Watching is a complete way to participate.