Sorry for the bizarre question, but just sat on the train wondering. Once you get to a very good level in drawing an stop for a while (for whatever reason), 1 month, 1 year, 5 years whatever, do you have to practice loads to get back to where you were? Or is it more of a 'rusty' feeling, I.e. A few drawings and you're back where you left off?
p.s. This is not based on me btw, checkout my sketchbook you will see I am there yet!