Ascend/ Descend

Ascending or descending is to ascend or descend the time achieved on each effort over a series of set distances (4 x 100 DES 1 - 4). Generally speaking, ascending is to swim slower on each effort and descending is to swim faster. Ascending and Descending are often written as ASC or DEC. 

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It is common to be confused when you first hear of ascending or descending in your swimming sets. The key is to remember these terms refer to time. Competitive swimming is always measured