A marathon swim taper is different from a short swim taper. The rule of thumb is "the longer the swim, the shorter the taper." In my final days of training for the English Channel, I will continue to swim for many hours in a day. My taper begins on the day I leave for England. After arriving in Dover, I will train for no more that two hours per day in Dover Harbor. I will get plenty of rest during the day and no sightseeing until after my channel swim. This type of taper worked very well for me last year. The day of my channel swim I felt energized and strong.