The S-stroke or I-stroke?

(University of Tsukuba) The year 2016 is an Olympic year. Developments in high-performance swimwear for swimming continue to advance, along with other areas of scientific research. One area of research has focused on which type of crawl stroke is more effective -- when the arm draws a curve in the water (S-stroke) or moves straight (I-stroke) -- long a matter of debate in the world of competitive swimming.
Source: EurekAlert! - Social and Behavioral Science - Category: Global & Universal Source Type: news