Exercise can help one's memory! (3)

I believe the answer is:
jog
This could be a double definition.
'exercise' is the first definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'help one's memory' is the second definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'can' is the link.
Can you help me to learn more?
(Other definitions for jog that I've seen before include "Slow run" , "Reminder" , "Trot" , "exercise?" , "Run at a leisurely pace" .)
