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.
Backstroke is pretty much the same as front stroke, apart from your body is the other way round. Instead of lying on your front, you lie on your back, kicking your legs the same way as you do in freestyle, and you raise your arms, which starts by your side, comes back over your head, and into the water.he is the most basic stroke of them all, as well as the fastest. It involves your knees touching, kicking your legs, and raising your arms alternately out of the water, over your head, and back in the water again, in a windmill motion.