They allow swimmers to propel themselves into the water firstly of the race, which may be troublesome with out them! Beginning block development must meet stringent tips set in place for swimmer safety and comfort! Beginning blocks may be designed to meet the rules of FINA, USA Swimming, NCAA, amongst others. When it involves the world of competitive swimming, there are... http://giscience.sakura.ne.jp/pukiwiki/index.php?romerobeard992723