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context: outside a regular pool, usually in a lake, or sometimes ocean. Popularity of the sport has grown in recent years, particularly since the 10 km open water event was added as an Olympic event in 2005, contested for the first time in the 2008 Olympic Games in Beijing. New recent technology has developed much faster swimsuits. Full body suits have been banned, but swimmers at the very top levels still wear suits that have been lasered together because stitching creates drag. The disadvantage of these suits is that they are often uncomfortable and tight, and can tear easily if not </s> 100-meter pool was built for the 1908 Olympics and sat in the center of the main stadium's track and field oval. The 1912 Olympics, held in the Stockholm harbor, marked the beginning of electronic timing. Male swimmers wore full-body suits until the 1940s, which caused more drag in the water than their modern swimwear counterparts experience. Competition suits now include engineered fabric and designs to reduce swimmers' drag in the water and prevent athlete fatigue. In addition, over the years, pool designs have lessened the drag. Some design considerations allow for the reduction of swimming resistance, making the pool faster. </s> There are 24 kyōtei stadiums in Japan, all of which refer to themselves as BOAT RACE courses. A Kyōtei race is conducted on man-made lakes with a 600-meter oval boat course. Six boats race three laps around the course (1,800 meters). Races are generally over in about two minutes. Kyōtei employs the "flying start" system of beginning races. Once competitors receive the signal to "pit-out" of the docks, they will maneuver their boats in an effort to secure a starting position while a large clock situated at the start/finish line begins a one-minute countdown. Starting positions are usually established with
question: how many lanes in a olympic swimming pool