"Muscle Memory" is a term used to describe a learned movement pattern or habit. By performing the same movement pattern repeatedly, more effective nerve muscle connections are made.  These new connections repeat more efficiently each time used.  Research from motor (movement) learning specialists indicate that repeating the same action 3,000 to 5,000 times, or performing a task approximately 30 minutes for a period of 21 days is necessary to create muscle memory. After developing muscle  memory, the new action is automatic and can be performed without conscious thought.