Actually, a hot shower only would not have the same benefit as a hot-and-cold shower.
As you swithc from hot water to cold, your blood vessels actually open and close, flushing lactic acid-which causes soreness-out of the muscle.
Don't take only my word for it ( I have been doing it for a few years) ;there are sports injury management specialists who work with Olympic hopefuls that advocates this method and swers by it.