Years ago, when I learned the reverse pendulum serve https://www.youtube.com/watch?v=5ABYzbHJJac" rel="nofollow - MMaze style , I immediately stopped struggling when I noticed that his back swing starts the latest possible, as close as possible to the swing, it goes "tchack-tchack" and it's very fast in a spring effect, the back swing loads energy into the spring that unloads faster than if the back swing had started earlier. I still could do only one in 5 applying the idea but that one in 5 was so good I knew I had nailed it awareness wise.
Interested in the pronation/supination discussion, I am thinking of applying this to the fh and bh drives and loops: just like in the reverse pendulum serve, more energy is transferred from the back swing to the swing, the hand never stops moving, it is more efficient.
In both fh and bh, the trajectory is more an ellipse than a straight segment where the paddle stops completely before starting from scratch.
It works only if we crouch more in the back swing to draw a wider/taller ellipse when pushing from the legs (that's more related to the fh), its little axis will be higher. Above all it allows starting the back swing later, that little detail offers a double benefit: -we have a bit more time to prepare the stroke -the final speed of the paddle is higher.
On the fh side, in addition to the pronation, lumbar protection and the above, we are starting to close in a seriously well understood stroke.
On the bh side, the idea is even more pronounced when the back swing goes to the non playing hip palm facing down as I tried describing earlier today http://mytabletennis.net/forum/forum_posts.asp?TID=89117&PID=1105466&title=supinate-vs-pronate#1105466" rel="nofollow - there , we can go "tchack-tchack" much better than on the more fluid fh where so much more mass is in movement.
The above all sounds logical to me and I wonder why I never read anything uniting all those tidbits into a simple yet solid model.
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