10 years ago by
A Pianist
Something that contradicts this is the idea that any efficient movement should be reversible at any point. But I doubt the pub level pool players are working to this principle, just
I'm not sure if that premise ought to be extended to anything that relies on higher speeds- although I definitely agree in slower movements. I'm just speculating perhaps, but I think the premise about movement being reversible is that it shows control. If you're lifting a weight and swinging it, you're not controlling it and it may be that an initial burst overrides productive muscular activation through much of the range. If you can change direction at any time, your muscles are always in direct control of the whole movement.
The problem is that when a large amount of momentum is involved due to necessity of faster speeds, it takes time to change the direction- just like how you can't suddenly go from 30 mph to reversing in a car. However, I do like the idea of attempting to make a movement fully reversible as much as possible in practise- before finally just letting it fly only when it becomes necessary and productive. I suspect that it's generally rather late that the movement becomes truly irreversible for good players, and flies straight through without repression. Bad players often start a real swipe before they've got anywhere near the ball- leaving no scope to continue to accelerate through.
Actually, it's interesting to think about "coasting" too. If a finger is just coasting, the key's resistance will slow it down a great deal. Similarly in pool. If you're coasting, you can't provide something additional to go through that resistance, so energy will be lose. Just because something is already moving fast, it doesn't mean it transfer energy well- unless it has that extra impetus through the moment where something is trying to slow it down. I think this does relate to the idea of being able to keep movement reversible- even if not in the most strict sense.