Separate date for pull and push forehands?
Domo arigato. I can take a limited peek at the contents with Amazon or Google Books. Which pages (or sections) do you suggest?
http://www.amazon.com/Applied-Anatomy-Biomechanics-Sport-Bloomfield/dp/0867933054
I picked up on that first point but the 2nd one puzzles me. It seems that Knudson came to pretty much the same conclusion that Plagenhoef did. Didn't
Plagenhoef say that the peak racquet velocity
at (or immediately prior to) contact?
Perhaps the errors in toly's recent diagrams reflected the data smoothing errors that Knudson speaks of.
It seems that we have been seeing some conflicting data in this thread. Perhaps some of it is due to data smoothing errors or perhaps not. Nonetheless, I believe that the
double pendulum model,
trebuchet model and the triple pendulum model are all useful for providing us with some insight into what is happening with a tennis serve or forehand.
Even if these models are not completely accurate, they still provide us with some useful information/insight as you mentioned before (several pages ago). Yes, they are only part of a larger, more complex sequence of events. I'll have more to say about the models in another post.
.
SA,
Nos morituri te salutamus.
1.Separate data for pull and push forehands would be very useful
I have tried to indicate that separation of data would improve the understanding of the role of wrist
see your quote from one of posts above:
"It suggests that peak racquet head velocity occurs at impact whereas peak wrist velocity and the max shoulder horizontal velocity occurs about 40 ms prior to impact for an elite player."ides
Does it mean that the speed of the wrist is somehow "synchronized" with the speed of
the tip of the racket (i.e one peak coincides with ANOTHER peak)?
2.Problems with one camera
Please see
http://tt.tennis-warehouse.com/showthread.php?t=384050&page=293 Post #5860
I understand that articles we discussed have more than one camera
so we are dealing with a bit better scenario.
It is a BIT marginal issue RIGHT NOW.
3.You did NOT to response to my post #193
I understand that my question was NOT well explained-
is it the case?
Your quote
"Nonetheless, I believe that the double pendulum model, trebuchet model and the triple pendulum model are all useful for providing us with some insight into what is happening with a tennis serve or forehand."
My opinion is that it is correct if we agree what is the expression for the energy of the system.
4.I am interested in the sections(written by Elliot) of the book
http://www.amazon.com/Applied-Anatomy-Biomechanics-Sport-Bloomfield/dp/0867933054#reader_0867933054
I am interested in the newest edition -the price is around $300 (sic)
The full link from Human Kinetics is
http://www.humankinetics.com/produc...atomy-and-Biomechanics-in-Sport-Image-Bank-2E
Please note the phrase "Sport Image Bank" in the title
My quote above was NOT complete,I apologize
5.Your quote
"Didn't Plagenhoef say that the peak racquet velocity at (or immediately prior to) contact? "
I have problems finding this quote
6.About Johannes Landlinger
http://www.itfcoachesconference.com/2011/?q=user/87
7.I will check for new papers and quotations of authors of
http://www.jssm.org/vol9/n4/15/v9n4-15pdf.pdf
8.A quotation about The B.E.S.T
Neuromuscular Training – The B.E.S.T. system generally replaces range of motion with muscle performance optimization. Full benefit of this transformation requires specific training of the bodies’ neuromuscular system. Training sessions utilize innovative techniques designed to improve the performance of this system through specially developed exercises. The exercises specifically target the force that muscles can produce at HIGH SPEED while using the exact motion patterns of the B.E.S.T. system stroke techniques.
One may consider to put a separate thread-I have to think about it