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.
Freestyle/Front Crawl Stroke. The most common swimming stroke is the freestyle or front crawl stroke. It is the most natural to perform of all the different swim strokes and can be performed in a swimming pool or other bodies of water. The freestyle stroke allows you to swim straight on your stomach by kicking your legs and rotating your arms over your head.