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.
Swim Workouts for Swimmers - 6 x 250 Faster as They Go. Share. This middle distance focused swim workout uses 200s. The workout moves you back and forth from easier to harder, back and forth, steadily moving toward an emphasis on faster swimming as the set progresses.