So basically the muscles just lose the quick coordination from long periods of slow running. BUT this coordination loss can always be retrained to be fast in a relative short amount of time regardless how long one runs slow? For example if one runs slow for 6 years and another runs slow for a year they will both be able to get their speeds to a max in a month regardless if one ran slower longer???
First, I always dislike absolutes. Can always be retrained? I would think so but I'm not prepared to say always just because that is so absolute. There are many variables that might not make that possible.
Can they get the maximum speed back as quickly as someone who has never gotten too far away from speed? In a month? I'd say no. It might take more time but I'd think, in most scenarios, it could happen given the proper amount of time and work, which may vary depending on the runner.