Shift can be either weight shift or stride
Swing is that moment where the bat is set in motion to the ball.
Hip turn is the final addition of circular motion increasing bat speed.
Video Analysis
Joe Dimaggio
http://www.youtube.com/watch?v=zr5FEomvZ8A
Swing - 01
Hip Turn - 01.7
Babe Ruth
http://www.youtube.com/watch?v=E1tgPPlqDtI&feature=related
Swing - 01
Hip Turn - 02
Lou Gehrig
http://www.youtube.com/watch?v=p3nA_T1iv8k&feature=related
Swing - 04
Hip Turn - 04.7
Stan Musial
http://www.youtube.com/watch?v=vLYVDCEz_yg&feature=related
Swing - 02
Hip Turn - 02.5
Mickey Mantle
http://www.youtube.com/watch?v=etSfBwcNpII&feature=related
Swing - 02
Hip Turn - 03
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