How to officiate backstroke
USA Swimming 6:35 2015-06-24 01:27 218 506 867 23

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USA Swimming (Organization)Officiating Swimming Backstrokebackstrokebackstroke swimmingofficiating backstrokehow to officiate backstrokerules of backstrokebackstroke rulesbackstroke rules and regulationsbackstroke turn rulesbackstroke rules swimmingbackstroke startbackstroke finishbackstroke kickbackstroke video tutorial