From my Anki deck:
Mental play or offline habit training is...
...practicing skills and habits only in your imagination.
Rehearsing motions or recombining them.
Imagine some triggers and plan your reaction to them.
This will apparently improve your real skill.
Links:
https://en.wikipedia.org/wiki/Motor_imagery
http://www.bulletproofmusician.com/does-mental-practice.../
http://expertenough.com/1898/visualization-works
From my Anki deck:
Mental play or offline habit training is...
...practicing skills and habits only in your imagination.
Rehearsing motions or recombining them.
Imagine some triggers and plan your reaction to them.
This will apparently improve your real skill.
Links:
https://en.wikipedia.org/wiki/Motor_imagery
http://www.bulletproofmusician.com/does-mental-practice.../
http://expertenough.com/1898/visualization-works