Health And General Life Care: Re: [Supertraining] Can the fastest movement be more spatially accurate than a slightly slower one?

Re: [Supertraining] Can the fastest movement be more spatially accurate than a slightly slower one?

Thursday 24 January 2008

0 comments

I have the text and I understood it this way.

Speed/accuracy tradeoff holds. The faster you try and move the less
accuracy you have. However, in a skilled motor pattern as you
approach 100% there is less variability. We are not talking about an
aiming task. We are talking about a motor skill.

In driving a golf ball you need a certain amount of variability,
since there is an aiming part to the task. But think of lifting a
weight. In a maximum effort deadlift there would be little
variability. If you got outside the groove at all the lift simply
wouldn't go. At 80% there could be some variability in the motor
program and you could still make the lift.

At 100% you are using all motor units and so almost by definition you
have reduced the chance for variability.

Put another way - an aiming task requires some feedback to be
successful. In a very quick movement there is no time for feedback.
Hence there is really no paradox here - aiming and variability are
two different things.

Hope this helps.

On 23-Jan-08, at 9:03 AM, Hannu Leinonen wrote:

> Hi everyone,
>
> Just finished reading Schmidt's book on Motor learning and
> performance.
> He stated that "with the shortest time (i.e., 80 ms) actually
> producing
> less spatial error than the next shorter time (i.e., 102 ms). This
> finding is contrary to the strict view of the speed-accuracy trade-
> off,
> in which faster movements are always less spatially accurate".
>
> If I understand this correctly, it would mean that driving a golf ball
> max or near maximum effort should be more accurate than - let's say
> 70%
> speed?
>
> This does not feel right. Is there any experiments on accuracy and
> it's
> relations to force?
>
> Hannu Leinonen
> Jyväskylä, Finland
>
>
>

Keith Hobman
Saskatoon, Canada

[Non-text portions of this message have been removed]

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