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The activity-set hypothesis for warm-up decrement in a movement-speed task.

R A Schmidt¹, C A Wrisberg

¹a Department of Physical Education , The University of Michigan.

Journal of Motor Behavior

|August 15, 2013

Summary

Warm-up decrement (WUD) results from losing generalized readiness to respond. Practicing a different task during rest prevents WUD by reinstating this readiness, supporting the activity-set hypothesis.

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Area of Science:

Motor control
Cognitive psychology
Human performance

Background:

Warm-up decrement (WUD) is a phenomenon where performance decreases after a rest period following practice.
The activity-set hypothesis proposes WUD arises from the decay of a generalized readiness to respond.

Purpose of the Study:

To test the activity-set hypothesis regarding the cause of warm-up decrement.
To investigate whether maintaining a generalized readiness to respond prevents WUD.

Main Methods:

A right-hand movement-time task was used with 34 university male participants.
Participants underwent a 10-minute rest period, either resting (REST) or resting while practicing a left-hand task (ACT).
Performance on the right-hand task was measured before and after the rest period to assess WUD.

Main Results:

The REST condition showed significant warm-up decrement, which diminished rapidly.
The ACT condition, involving practice of a different limb task, demonstrated no significant warm-up decrement.
This suggests that maintaining an 'activity set' for movement speed prevents WUD.

Conclusions:

The findings support the activity-set hypothesis, indicating WUD is due to the loss of a generalized, non-habitual readiness to respond.
Maintaining this readiness, even through practice of a related but distinct task, effectively eliminates WUD.
This has implications for understanding skill acquisition and performance maintenance.