Batting Information:
http://www.youtube.com/watch?v=cIg8-L5UZos&feature=fvw
http://www.youtube.com/watch?v=sDPLTjuW3co&feature=related
http://www.youtube.com/watch?v=FO9vZlUllCk
http://www.youtube.com/watch?v=Xk7_xQJNwao&feature=related
http://www.youtube.com/watch?v=3BpbVifzm44&feature=related
Articles on Sports Medicine:
http://www.ipsm.org/publications/softball_injuries/softball_i.asp