All around the world, medical doctors and sports scientists are actively promoting regular physical exercises to gain health benefits. However, in contrary to the promotion of the health benefits, sports also cause injuries (Chan et al. 1993), which are often comparable to traffic accidents, occupational injuries, as well as violence as indicated by the attendances to emergency departments in numerous countries like Sweden (de Loes and Goldie 1988), the United Kingdom (Jones and Taggart 1994), and North Ireland (Abernethy and MacAuley 2003). With the promoted participation in sports and physical activity, a growing exposure to potential injury should increase and thus the rising incidence of sports injury (Shephard 2003).