here in hong kong, we call it hydro fitness or aquatic fitness or aqua exercises...
the following is a pretty good clip from you tube, check it out...
... ... ... ... ... ... ... ... ... 介紹更多有關 水中健體運動 (水健) 及其他運動, 或更多... ... ... ... ... ... ... ... ... ... ... ... ... ... ... all about hydro fitness sports (water fitness / aquatic exercises) ... ... ... ... ... ... ... ... ... ... and other sports, or even more
