Table 3: Summarizing traits, advantages and shortcomings of several strokes.

Speed a Economyb Orientationc Free Breathing Skill (Difficulty)d
Front Crawl +++ +++ 0 0 +
Back Crawl ++ ++ + +++ ++
Breaststroke + + +++ +++ +++
Head-up Crawl ++ + +++ ++ +++

a from the present results b references for the economy [7, 14, 21], there are no studies comparing breast with head-up crawl, so their internal rank of economy cannot be addressed. c meaning how easy it is to look for obstacles or to look for the direction to swim d this is a matter of the authors opinion