The specialized combat swimmer stroke (CSS), also known as the combat sidestroke, is just a modified version of the elementary sidestroke. The modified version actually mixes in a few changes that ...
Lance Cpl. Amber Martinez executes a ‘side stroke’ during the testing portion of the Advanced Swim Qualification Course at Ramer Hall, Quantico, Virginia, April 11, 2014. (Cpl. Christina O'Neil/U.S.
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