Similarly , Stefanek ( 2004 ) examined motivation of TKD practitioners .
Similarly , Stefanek ( 2004 ) found that TKD participants considered important many of the same features as traditional sports , such as skill mastery , challenge of competition , fun , and exercise .
Similarly , Stefanek ( 2004 ) examined motivation of TKD practitioners and found that TKD participants considered important many of the same features as traditional sports , such as skill mastery , challenge of competition , fun , and exercise .