The third 1,000 used Streamline Sticks at the 12.5 yard mark .
The third 1,000 emphasized underwater dolphin kicking ( in any body position ) and the swimmers could choose the body position to continue kicking in once they surfaced .
The third 1,000 used Streamline Sticks at the 12.5 yard mark and emphasized underwater dolphin kicking ( in any body position ) and the swimmers could choose the body position to continue kicking in once they surfaced .