Conversation so far:
What is important about this period of time for Robert Schumann?
At age 20 taking piano lessons from Friedrich Wieck, who assured Robert Schumann that he would be a successful concert pianist after a few years' study with him.
Did Robert Schumann perform any concerts while studying underneath Friederich Wieck?
In the winter of 1832, at age 22, Robert Schumann visited relatives in Zwickau and Schneeberg, where he performed the first movement of his Symphony in G minor.
Why did Robert Schumann abandon the idea of a concert career?
During his studies with Wieck, some stories claim that Schumann permanently injured a finger on his right hand.
How did Robert Schumann injure the finger on his right hand?
Wieck claimed that Robert Schumann damaged his finger by using a mechanical device that held back one finger while he exercised the others—which was supposed to strengthen the weakest fingers.
How did the injury to a finger on his right hand affect Robert Schumann's ability to play the piano and other instruments?
Robert Schumann abandoned the idea of a concert career and devoted himself instead to composition.

Question: Do we know how old he was at this time?
Self-contained rewrite: Do we know how old Robert Schumann was when he abandoned the idea of a concert career?