Answers

2015-07-06T23:00:59+08:00
In my own idea? It's uh.. you can train your immune system or your own skills in sports. It's useful for the teenagers who wants to be an athlete.
1 5 1
2015-07-07T09:02:55+08:00
Training in development of and care for the human body; stresses, athletics, includes hygiene 
0