Here's an explanation from a physics professor (cited in the original article) that might help explain what "save energy" means. http://nacto.org/wp-content/upl

Here's an explanation from a physics professor (cited in the original article) that might help explain what "save energy" means. http://nacto.org/wp-content/uploads/2012/06/Fajans-J.-and-M.-Curry.-2001..pdf http://nacto.org/wp-content/uploads/2012/06/Fajans-J.-and-M.... In case you can't be bothered to read this either: > He also calculated that a cyclist who rolls through a stop at five miles per hour instead of stopping fully needs to use 25 percent less energy to get back to full speed.