Flat Serve vs Kick Serve - Super Slow Motion
(To play, click on blue "back"button to see back view). In this one clip you will see Alex serving a flat serve and a kick serve. The clip begins with a freeze frame with a red and blue vertical line. The red line is an indication of the axis at contact for the flat serve. The blue line, displaced to the left, is an indication of the axis at contact for the kick serve. You will see these two lines throughout the clip to help you distinguish the toss and hit for these two serves. Note that the head remains under the blue axis on both tosses. That last few seconds of the clip accelerates to real time on the kick serve, just so you can see the energy of the serve.
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