| Summary: | Defining a term: BCM- Body cell mass characterizes the amount of cells that are able to exploit oxygen, as well as cells rich in calcium and cells which are able to oxidise sugars. There are cells of bone tissue, muscle cells, cells of heart muscle tissue, and cells of internal organs (gastro-intestinal tract mainly) involved. The main components of cell mass are particularly ICV - intra cellular water and ECW - extra cellular water. Intra cellular water contains 40 % of the adult man body weight, while extra cellular water contains of 20 % of the body weight, from which 15 % is eligible for tissue humour and 5 % for blood plasma. The approach: The work has been made for four children groups aged from six to fourteen, who are members of the handball team "TJ Sokol Nove Veseli". The first, the youngest group is presented by "prep-team"- there are children born in 2003-2000 years. Very young pupils, who are children born in 1999-1998 years, present the second group. The third group includes younger pupils, who were born in 1997-1996 years, and the fourth - the last - the oldest group is made up by older pupils, who were born in 1995-1994 years. For these children groups the measurements are made at the end of sport season, later during the preliminary season, and at the end of preliminary season. The aim of...
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