All about base excess â to BE or not to BE. In 1948, Singer and Hastings introduced the concept of buffer base (BB). The change in BB from normal was called deltaBB (Î´BB). This change in BB was an expression of the non-respiratory (metabolic) component of an acid-base disturbance.
Empirically from http://www.usaswimming.org/_Rain..., free style is the fastest stroke. This is also called the front crawl (see Front crawl). However as Swimming stroke notes, there are at least 6 variations of that technique.
While leeches are confident swimmers, they are not exceedingly fast, typically covering about a foot every few seconds (check out the video at the bottom for an example of a swimming leech). This type of motion is often most well imitated using a slow retrieve and a fly with a weighted head.