Swimming at the 1968 Summer Olympics – Women's 400 metre freestyle Swimming at the 1968 Summer Olympics – Women's 400 metre freestyle The women's 400 metre freestyle event at the 1968 Olympic Games took place between 19 and 20 October. This swimming event used freestyle swimming, which means that the method of the stroke is not regulated (unlike backstroke, breaststroke, and butterfly events). Nearly all swimmers use the front crawl or a variant of that stroke. Because an Olympic-size swimming pool is 50 metres long, this race consisted of eight lengths of the pool. Heat 1 Heat 2 Heat 3 Heat 4 Heat 5 Heat 6 Key: OR = Olympic record
Swimming pool service technician they be properly trained and certified. But there is a move afoot by the Center of Disease Control on a grant provided by the NSPF to create the first ever uniform aquatic health code. These servicemen generally clean either residential or commercial swimming pools. To properly clean a swimming pool, residential or commercial, a service professional, a residential pool owner or an employee of a commercial pool owner has a choice of manually cleaning the pool or using an automated pool cleaner if speed and efficiency is preferred. Swimming pool service technician A swimming pool service technician (known colloquially as