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Titulek 1 We are looking straight down at Frank's forehand and what I'm gonna do is draw a line between his shoulders and the elbows of his hitting arm. This is the completion of his preparation and what you'll notice is that this line is a straight line He's gonna keep this relationship from the completion of his preparation as he drops his racket down, you'll be able to use this relationship to tell when he starts to swing forward.
From the preparation, as the racket drops down this relationship is a straight line.
It stays a straight line but then as he begins to swing forward the upper arm and the elbow get ahead of his shoulder turn we're going to be able to see that here the racket drops down, elbow, upper arm still in line with his shoulders but now, and again, this corresponds more or less when he sets his hitting arm position now the elbow and the upper arm get ahead of this shoulder turn and if we freeze it at contact it's clear his arm has now swung independently of his shoulders his elbow and his arm are way ahead of his shoulders at this point So again, let's rewind it one more time completion of the preparation, put that line back real quick all in the same plane, all in the straight line he drops it down and then once he sets the hitting arm the arm and the racket swing independently of his shoulder turn to get to his contact point
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