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.
Fast and Basic. The fastest stroke for most swimmers is the front crawl. The crawl begins in a facedown position with arms and legs extended. The arms alternate pulling against the water along the front of the body, exiting the water just below hip level.utting It All Together. Freestyle events in swimming meets allow competitors to use any of the four competitive strokes -- crawl, breaststroke, butterfly or backstroke. It's not uncommon to see an athlete vary between strokes in long-distance events, but the crawl is almost always used in sprinting competitions.